Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe760053e3b79ae4…

MALICIOUS

PDF

87.5 KB Created: 2021-09-07 00:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b9336baf77e126105244ecf34ef52c8f SHA-1: 534829ae3ebdfa957ba8033a7e203be69f15521b SHA-256: fe760053e3b79ae4f4b5aee1e38a8ee8b739fa499b599abe247d5138857bda79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be446f3d5ba---23972389703.pdf In PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607087d895bd2---lavepidedabenal.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55841224416.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed0dadee39---50951076209.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/85171559405.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9c792632aeccf24efc68a0824665d358/nowimemusifenolesiji.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/99123356659.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/mixowefagik.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/avp8guknj90me1b32u8r4o8ld0/2684475676.pdfIn PDF document text
    • http://xhzhengli.com/upload/vafesikomokej.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/fedilafugedisizewiwiz.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/22117950990.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9ebdf25ba8f4a0cbeedab68739ea44a6/76018133945.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104a978a6f71---fisomexusunifo.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/f8238ced78fbefd64ec4f104b0f86906/14937454175.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/pijezefireri.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/zibenewulepaxare.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f78b8047f79---sivajuluwomib.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/apqh6jltg47m7lhebgvutlo35i/vedolidivasogukegolad.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/ziruf.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2c27067eb38ce675d34b2d67a4204412/zazuze.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210613075914.pdfIn PDF document text
    • http://ahchala.com/img/file/xigejuwigusinipera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=se%C3%B1ales+preventivas+de+transito+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10451 19300 bytes
SHA-256: f98274af62bc40fdb0660b1cf6cd67f9408ced5596c40dbbe06d365fc3e62005
font_02_sfnt_off00013571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13571 10836 bytes
SHA-256: fab0236658e23ea81297434db40db9c636f63a604c9f6f43aaeec667b5a9f848

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