Malicious PDF — malware analysis report

Static analysis result for SHA-256 562d49e2678c22aa…

MALICIOUS

PDF

87.7 KB Created: 2021-06-02 04:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 618a2bf55ce234b1995dbe6d87ba7e05 SHA-1: cfe426a947dde0d355f902b4b79e08112ca4fd2b SHA-256: 562d49e2678c22aa7455435278541c83d73813004f07643ebdd0dfb0a02cdb99
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 0.9996

Heuristics 5

  • 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 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://soxebez.ru/123?utm_term=burna+boy+new+song+another+story PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408711/normal_6009a14b03c11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478422/normal_5ffe73b670367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457604/normal_603b6d8963a68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467277/normal_5ffb3e1ef06fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_603d6160dcd1a.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4372358/normal_60b4c052329f2.pdfIn PDF document text
    • https://ririrufazerox.weebly.com/uploads/1/3/4/5/134501654/xufibelalimezaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501770/normal_5fd22edd79ca3.pdfIn PDF document text
    • https://gimebupezepufo.weebly.com/uploads/1/3/4/5/134507041/1509987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_603335b3a7492.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144414639/skyrim_how_to_use_cbbe_bodyslide.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/how_often_do_nurses_get_tested_for_covid.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144415209/nuvipiduvupavejenapabuz.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144424671/is_k-12_effective_or_not.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144485898/list_of_adjectives_in_english_with_hindi_meaning.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144436704/danielle_steel_books_free_download_for_ipad.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/91023225177.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144455178/what_does_prednisone_cure.pdfIn PDF document text
    • http://liguduper.pbworks.com/f/simple_bible_commentary.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144427668/what_happens_if_you_bump_your_nose_after_rhinoplasty.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144414129/itouch_air_se_smartwatch_manual.pdfIn PDF document text
    • http://wefolevemud.pbworks.com/w/file/fetch/144481056/wonetosuzuwavepunel.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_off00011c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C32 5300 bytes
SHA-256: e01b764bf804e629cdba420a8bd2dbe74744087766135024db4dd67ab0b5a76e
font_01_sfnt_off00012e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4B 10876 bytes
SHA-256: aaa49c32b4910e2b77f11c8caac736483536bc440aa53ce076a8429aa08ae534

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