Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e177a6d072da11…

MALICIOUS

PDF

98.9 KB Created: 2021-07-16 08:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c860a4fba6b4ddbd93c38f1dec5d5b1e SHA-1: 4315ac1490355a5c6b0a9424d1591389725620d4 SHA-256: c8e177a6d072da11579c6f98e0cff066e7add6c93972d65d109ec43f8265b7db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to compromised websites, many of which are hosted on disposable domains or use link farms, indicating a phishing or malware distribution attempt. The PDF structure and embedded links suggest it is used as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://bigandtallking.com/userfiles/file/62427777163.pdf In PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e494a7357---safit.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/lujoxomabenobetixarigew.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cefbceab0c2---22500285608.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/kinamonu.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210525195215.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160dec8bac3938---47203832958.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/8gnm40c3b4fsou11cb63c21255/63139584999.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/kumusad.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/29233384069.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092510c04270---32956534691.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/zoparevutesokapovu.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3972331d6---jebew.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/34693517768.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/8817671915.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce600d74b32---4825240882.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/nivemilasibigevuketil.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/42860202897.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c484d5eac3e---23512080631.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/15814949140.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/81592131378.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=where+to+level+up+maplestoryPDF 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_off00011fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000137c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C2 17592 bytes
SHA-256: 3dd14e2a0c0e4c88d00ee369038488cfb3fe5dfea8716b3540b952e3f9550a52
font_02_sfnt_off00016651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16651 10596 bytes
SHA-256: 20696d6ff43d09a16f2fa9d39a51282e51d3e25c3f5d125dd401452671c5e42f

Open this report in the interactive analyzer, or submit your own file for analysis.