Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2207337f3e511d…

MALICIOUS

PDF

74.2 KB Created: 2021-04-23 16:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f98001286b6475738030ef8b1277cd63 SHA-1: 94a09243c4ce56f39dfa3a04c8a8bed467f58c28 SHA-256: 7f2207337f3e511dc15a494627ed41c6c45e8b0cca84232b4a09377265f7ddba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=how+to+obtain+a+clergy+license PDF link annotation
    • http://helpcontactform.com/vosamavatoxudukufojon8pkc.pdfIn PDF document text
    • http://stat-index-co.com/55548825366wd8np.pdfIn PDF document text
    • http://obschee.xyz/58308899561lz0fp.pdfIn PDF document text
    • http://cmbespaceclient.xyz/convert_outlook_contacts_to_excel_spreadsheetwx98i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489428/normal_5ff8a3db6e727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5ff7c6cd42568.pdfIn PDF document text
    • http://ru-dev.xyz/christmas_crossword_puzzle_worksheetralmo.pdfIn PDF document text
    • http://byt-upak.ru/68708630025jbieo.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/wizexee570a.pdfIn PDF document text
    • http://help-copyrighteamservice.com/buselipitisesozowevujagdf06j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajujiju/ableton_live_9_skins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ebbf787-3745-4a77-bf9e-ff8a47e066d0/the_analects_of_confucius_a_philosophical_translation.pdfIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_14f4c57e4f51400fa6ce73b338a02c26.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefb1f17-c1d4-4ca8-bac5-9089ec0a7686/59287218036.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_1c7dba85688d42809afefaae0ddbd2b0.pdf?index=trueIn PDF document text
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_298bda32a9b84cdd8138d53f159fc7be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/xunofi.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/76238796950.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_46afeba27bcb48d7a88068f63a8d35f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e346493-91da-438a-99ed-28b0511a5598/to_the_sky_kingdom_pillow_book_ii.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_off0000e5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EB 5260 bytes
SHA-256: 27c285a07f7839fad7dba68272756629fb281da5827da908ca375ab6390f0d1f
font_01_sfnt_off0000f7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 10500 bytes
SHA-256: 16276cfd034d1a257d502e8c5c9afe5de50b5ccba1cc22df65b5a18051e28635

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