Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6071cdae7c96357…

MALICIOUS

PDF

78.1 KB Created: 2021-03-21 06:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 02c4b0a5255374b35662935fdcb9dc7c SHA-1: 5d2ead0cb74bf4a3587c132db6c13580582e795c SHA-256: b6071cdae7c96357f6c8c359a23c788c607567b5c9da7d81859bdfd63bf31284
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to host many PDFs. One of the primary URLs, 'https://mezovuduw.ru/award?keyword=consignas+adorno+pdf', is suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier further indicate malicious intent, suggesting the document is part of a phishing campaign.

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 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.
  • 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://mezovuduw.ru/award?keyword=consignas+adorno+pdf PDF link annotation
    • http://appletopshop.ru/81964157410bsg2q.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/defanawijefiz-fojezof-luvemu-lajininimufeke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_604dee7b1bc34.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/bd-j5100_blu-ray_player_wifi.pdfIn PDF document text
    • http://iranianvc.com/moca_test_scoring_meaningqqora.pdfIn PDF document text
    • http://card2card.live/mewopemexo8e8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fdf5b9658751.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/laroxejuruludopadada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448100/normal_601405df22eeb.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/fomivozonibokurexedako.pdfIn PDF document text
    • http://khanapoorti.com/free_printable_dot_to_dot_worksheets_for_kindergartentv3y3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_5fe974ca0ad49.pdfIn PDF document text
    • http://daating19.site/candy_crush_for_pc_free72h7f.pdfIn PDF document text
    • https://xafijaxipumin.weebly.com/uploads/1/3/5/9/135966545/0c75ca7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vifusupegiza/tegaxovoxotewogituvu.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/33978306818.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/6663956436.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/udi_rc_drone_u818a_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/algebra_1_chapter_3_test_answers_pearson.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/56215373387.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/how_do_you_do_scientific_notation_on_a_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/blue_jackets_roster_2017.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_off0000e40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40B 4788 bytes
SHA-256: 0d6f8aa5243077cf6ab35c28f0e38d14bdd8bb3daf8c89ab10e056b763745c0c
font_01_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 12020 bytes
SHA-256: 1d14db1f2d5bb888ea7f96a52d2060230a87fd58b3a127ad7c3d1bed3cff80ec
font_02_sfnt_off00011bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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