Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a442a64214bc9f6…

MALICIOUS

PDF

76.9 KB Created: 2021-02-25 05:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 52698379f0a0a764248458050a2a93f7 SHA-1: 16c36c6432bb904f7af3c2d6ddb8b6d182e8057a SHA-256: 6a442a64214bc9f6dcd62e7a7aef510cb6741bc28e51aadbc198e7529a568759
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs, specifically 'https://maypoin.ru/award?keyword=is+washington+dc+open+for+travel', suggests the document is designed to redirect users to a potentially harmful site. The 'SE_URGENCY_LURE' heuristic further supports the idea that the document uses deceptive content to prompt user interaction.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/award?keyword=is+washington+dc+open+for+travel PDF link annotation
    • https://cdn.sqhk.co/nipumusawobo/faXjCij/kanojozepafuse.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/31120719557.pdfIn PDF document text
    • https://zifalopo.weebly.com/uploads/1/3/1/3/131379769/giwilax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_600c752917477.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/starting_out_with_java_from_control_structures_through_data_structures_4_e.pdfIn PDF document text
    • https://paxepogemikut.weebly.com/uploads/1/3/5/3/135316128/vakejuz-bujufin.pdfIn PDF document text
    • https://cdn.sqhk.co/zifixanuk/adieaij/rapomanawebo.pdfIn PDF document text
    • https://jilusuno.weebly.com/uploads/1/3/5/9/135958885/3146052.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/gchgicD/batidobetatovaxaravex.pdfIn PDF document text
    • https://gibimigiwu.weebly.com/uploads/1/3/4/7/134748980/4476973.pdfIn PDF document text
    • https://kabijibijeg.weebly.com/uploads/1/3/4/9/134900291/7664910.pdfIn PDF document text
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/tezowuzem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446762/normal_60206863ec08f.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/uJsauhe/taptap_heroes_best_heroes_for_beginners.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/xonaxevetaf/61217827274.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/lineas_horizontales_y_verticales_para_preescolar.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/is_dark_one_of_the_best_series_ever.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/adventureland_full_movie_free.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/92947027769.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_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 5508 bytes
SHA-256: c76fe5155df214d9608a7f0527fbc2e59baa8024aa65259343db451f45c684e5
font_01_sfnt_off000102f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F3 10424 bytes
SHA-256: 019529ace4e1d730610e4149dd37b06e7a85069f0ac2349214694eeb74660140

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