Malicious PDF — malware analysis report

Static analysis result for SHA-256 d895fa16d7c1fbd6…

MALICIOUS

PDF

82.7 KB Created: 2021-02-23 23:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: aba64ee2384847187a66de46b1d3eaae SHA-1: a85e7bfc88fa0e76d7f372a0e43bf9de23e27c74 SHA-256: d895fa16d7c1fbd6dfe439cf536956a57ab8df3c852555bd3a2aec6a9c0b24d2
226 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document contains a lure to execute commands via the clipboard, a common technique for delivering second-stage payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. The document also hosts a large number of external links, many on disposable hosting, suggesting a link farm designed to redirect users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/wb?keyword=kenmore%20gas%20dryer%20parts%20near%20me PDF link annotation
    • https://cdn.sqhk.co/nonuripot/ja4WcKa/nusenupokagabo.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/tarofuzosabadebofo.pdfIn PDF document text
    • https://nobenala.weebly.com/uploads/1/3/4/3/134348336/9fe60736c7ad10.pdfIn PDF document text
    • https://gogovujogizog.weebly.com/uploads/1/3/1/6/131607278/bagisevukaboven.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/jheVit7/beat_swiper_vr.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/ancestors_legacy_slavs_guide14sl8.pdfIn PDF document text
    • https://xovesoxak.weebly.com/uploads/1/3/0/8/130813458/125a3be.pdfIn PDF document text
    • http://gatorama.space/descargar_tres_metros_sobre_el_cielo_gratis_completa7tbxz.pdfIn PDF document text
    • http://forpost-electrica.ru/fofuzapodusesoluc6gns.pdfIn PDF document text
    • http://pycnidwzxc.info/savaborizezobisawugelijasv540.pdfIn PDF document text
    • http://republvinb.fun/bissell_bolt_vacuum_brush_not_spinningtx557.pdfIn PDF document text
    • https://gosopitodemeku.weebly.com/uploads/1/3/4/8/134874694/xetuneten_dipopurubos_zebex.pdfIn PDF document text
    • http://kleomaften.online/411821948334zmz4.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/GibpHZJ/dususamos.pdfIn PDF document text
    • https://sibozigoguxo.weebly.com/uploads/1/3/0/9/130969143/8369480.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/4902078.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/jemisajoda/81518558985.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/48361071743.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/androidx._constraintlayout._motion._widget._motionlayout_not_found.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_off000105a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 5320 bytes
SHA-256: fbade16571a76eec33bdf1d227c53dda3c22a034af8178bdf45880f7f0df9a67
font_01_sfnt_off000117b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B4 11080 bytes
SHA-256: fc0b1a1be0b9c320b8a143779181a0fc8cdf260c5347ffe7de1b0c3e3b049f4d

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