Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbbf060d7e44c95…

MALICIOUS

PDF

78.1 KB Created: 2021-03-07 00:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4ef34fde4f301d2e61b910fce5315bda SHA-1: 945eb29b5c5c9d85abc79c6bef98f3c129d04fac SHA-256: dcbbf060d7e44c9539f5243c2cde421602459f9a1f8a6daa3dc4487cdc82903b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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
  • 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://bologen.ru/strik?utm_term=toro+power+max+726+oe+service+manual PDF link annotation
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/limijodexogovawobeki.pdfIn PDF document text
    • https://cdn.sqhk.co/dexujagafir/hdpDDX4/77421327784.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/ihmgf7f/20529548834.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/jaGjck2/68042581688.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/0ibjhXG/jetpack_jump_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zolususux/aYWgTLu/ty-_draw_road_cardiff_cf23_6xl.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/supoguroxexatek.pdfIn PDF document text
    • https://rinuvigilositu.weebly.com/uploads/1/3/4/4/134463450/9f21a6c195a2f8.pdfIn PDF document text
    • https://cdn.sqhk.co/metumolalub/agdLhfB/pocket_watch_tattoo_stencil.pdfIn PDF document text
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/5013997.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/lgjgcge/pc_simulator_android_18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexadujozopu.epizy.com/famipunadikagojejobes.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/bibonukufuzunakokuji.pdfIn PDF document text
    • http://wawutanow.epizy.com/81954930251.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/togopatutebix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8c5771-1935-4558-9287-0513d153369d/how_to_control_high_bp_with_mudras.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/platformio_external_libraries.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/vw_air_cooled_engine_rebuild_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6d4662-ba33-4598-b99a-c9c1a90247f1/dizaloxejurifululeteji.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ffbe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFFBE 23304 bytes
SHA-256: 84ded29ff15bbfedfebd8ba5578c22b82fa041412c70bf4a191cb8080763ac5c
font_00_sfnt_off0000cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB3 5612 bytes
SHA-256: 7f3012e249faca9272cace4fb16da6346f6af9db4d1d4dc3b23e407420a887f2
font_01_sfnt_off0000decf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 9560 bytes
SHA-256: de27e6a9ce55df7a67e69786d70dd13f839dc6d14e24b978bf81610f25ebe04b

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