Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e6c2d4b863c744…

MALICIOUS

PDF

75.9 KB Created: 2021-03-11 11:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2c1be32d4b7fb2db9631679aa2af53f1 SHA-1: 217c3466ad62ff87f92a98ab865d90596c834698 SHA-256: 80e6c2d4b863c744533d1becf7be504471e0700aeb1f46afaa804700596da39d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/123?utm_term=report+audience+tribunal+d+instance PDF link annotation
    • https://cdn.sqhk.co/woberimi/ig70KvF/35131594488.pdfIn PDF document text
    • https://bizutimuja.weebly.com/uploads/1/3/3/9/133999747/2a81a0f6fb96730.pdfIn PDF document text
    • https://zebonusifok.weebly.com/uploads/1/3/4/5/134509505/8892994.pdfIn PDF document text
    • http://hempmap.ru/tewulepurasawamofumuko5g0w.pdfIn PDF document text
    • http://easycreditscore.info/medenokunuxuxuperevaxukhnigx.pdfIn PDF document text
    • http://sfr-espace.best/transgender_top_surgery_near_meejl4g.pdfIn PDF document text
    • https://cdn.sqhk.co/golomamone/giBtXgi/32960416831.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/Sih7geW/incubator_clean_water.pdfIn PDF document text
    • https://kibepujuvug.weebly.com/uploads/1/3/4/6/134644113/5136089.pdfIn PDF document text
    • https://xojunujad.weebly.com/uploads/1/3/1/1/131164104/9038234.pdfIn PDF document text
    • http://zdsshop.top/fireboy_and_watergirl_online_cool_mathmsc9k.pdfIn PDF document text
    • http://stroiline74.ru/los_42_nombres_de_dios_yehuda_berg_gratisa4t8l.pdfIn PDF document text
    • https://fenorave.weebly.com/uploads/1/3/4/6/134639489/a06a17c0b2ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/644d5882-3d2e-47a4-aad7-dea89573302f/93001346530.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_7ee3cfacf8c840f7b6d2e8d618ed61d0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf98e051-538f-465e-8f7b-2a6525616884/sharepoint_2013_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/body_shop_vitamin_e_sheet_mask_review.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_417637a7011849cca114d779c82a7e8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/86504329642.pdfIn PDF document text
    • https://fa0867c9-8cf0-46f9-bfae-aad8e49c21f3.filesusr.com/ugd/cdba2c_59a9013119984652823a38a8e39a45a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/191d2412-3032-4600-a380-b02ee3024c1a/love_is_fallacy_question_and_answer.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_8ce03091d534404187a9f346f02970d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lovetijif/46884919922.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A5 5216 bytes
SHA-256: 8ec6ca0168dba4a8b7af6fef90f773d160f06b4d071cad36a2f36b57ed1af7fb
font_01_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 11180 bytes
SHA-256: 11a8ef1774fe87d75324574f55d5902961b5a8a9b1571c22bdbc6a0bc4cb2641