Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4ad5c927d01db5…

MALICIOUS

PDF

91.3 KB Created: 2021-07-01 23:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8f960291e59c14f48ec4533142b82e0a SHA-1: 4b484709cf8789b3978e793d4aa446935ccc1b0c SHA-256: 1f4ad5c927d01db5a1aafa83cd25491c54be1836b11b015e23cb62e61c911eca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b632538ec7---87874407716.pdf In PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/hj9eo02he16bkjclgsepu3oaa3/minod.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e986c5df2---xedulogedesoxafewokig.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5078eee95---wikunuwejunevixunadasi.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/22489518771.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c72693049---76134022226.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/38957158ca170bcdbb9d0012c110470b/tevavowazovejenavot.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a70ff28ec84---fasugezuba.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/42568089280.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/jpca4s58k8jstgcb7p1hq7rjgj/4904939222.pdfIn PDF document text
    • http://cuacuondaiphuc.com/upload/files/22765628208.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946f5f9d561---87517892944.pdfIn PDF document text
    • http://ihvanturizm.com/rsm/files/7565368362.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/zifedinazamogivutules.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/43a77140decd9bc537fa0362835f21c4/kujajebiwazumepexux.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/92885832c142395ed2f8c85f081bd12d/pukigil.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210508/file/25230318898.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caef2cb0b5---90904664274.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/pts38v8bj6ikm4p1ji3qkg9ngh/95514517980.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f344afe91192c454bb7e00b78524e8b/migozoro.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/siwegusefasutigof.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b6ecd6cdb---kovinavapunil.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48802228084.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b2ae6a655403dfb4ec6066c254ba9c8a/nuwudid.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9715f94556a689cfc84959c788329924/70709674595.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=jonah+in+the+belly+of+the+whale+kjvPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 17204 bytes
SHA-256: e58c2ed1951bc097184eafe5a2b8ed01832fc8e9d9e56d67c946ace19120041a
font_01_sfnt_off00011899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11899 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B0 10664 bytes
SHA-256: 055fa29deaf34a4e9f2d0068d72efcb5e8ee3985c24ff59269b6453aa150e8c4
font_03_sfnt_off0001490f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1490F 16304 bytes
SHA-256: 5cc96a07519cead37a5ebccff3b0a5c1798019739161db8c002933a07876f7b1

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