Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ad4f7cb44e6ad1…

MALICIOUS

PDF

80.1 KB Created: 2021-02-14 05:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b1c907f53641da407208ece29bfd92aa SHA-1: 1bb1c348e3c0dd66d252de91f068b5a49217388e SHA-256: 00ad4f7cb44e6ad1d97b4dfed9a8141e1ac96beb26471201e2ca0ba3f44c3e15
126 Risk Score

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-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://seumenha.ru/wix?keyword=atomic+emission+spectrum+lab+answers PDF link annotation
    • https://jakigirizog.weebly.com/uploads/1/3/1/4/131453624/mejozefuxakibizete.pdfIn PDF document text
    • https://fereganew.weebly.com/uploads/1/3/4/1/134131887/400503.pdfIn PDF document text
    • https://busedulaxuxelo.weebly.com/uploads/1/3/1/3/131379622/zesave.pdfIn PDF document text
    • http://salearea.pro/bhojpuri_film_song_2019lc4re.pdfIn PDF document text
    • http://nefufovej.22web.org/countertop_microwave_reviews_consumer_reports.pdfIn PDF document text
    • http://salon-fresh1.ru/electrically_conductive_silicone_rubber_sheetdpvq8.pdfIn PDF document text
    • https://pexevirojaloko.weebly.com/uploads/1/3/4/8/134882405/kuvubuve.pdfIn PDF document text
    • https://lovevupadu.weebly.com/uploads/1/3/5/3/135328586/futafezawula-tozeta-mubesu-biloxemovoraful.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/744068.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/jegdifP/puneda.pdfIn PDF document text
    • https://lupagizan.weebly.com/uploads/1/3/1/6/131637074/gazezeloso.pdfIn PDF document text
    • http://vifijes.22web.org/sutitukogola.pdfIn PDF document text
    • https://pimipile.weebly.com/uploads/1/3/4/8/134883166/90cdcd6490.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://purevaxa.epizy.com/kiwuxetilaga.pdfIn PDF document text
    • http://rerovoxuwalutew.epizy.com/show_some_important_full_forms.pdfIn PDF document text
    • http://warepeg.rf.gd/instagram_dark_theme_android_9.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/fasiruzotugixeros.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43E 1596 bytes
SHA-256: 2f40bb06fca9b6afa603075e8860d9ded7d4f8f3812b63d4e0bdd314cca1484b
font_01_sfnt_off0000fc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3D 5300 bytes
SHA-256: 68f96773960f1d9e3d7ceecce02cca5f47755f9c88c40ec43aac168c3278a32e
font_02_sfnt_off00010e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E38 10760 bytes
SHA-256: ae45e893df74170781b43cd004022071c6368ff1d0c4e48086d48a23debd82df

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