Malicious PDF — malware analysis report

Static analysis result for SHA-256 45accfd7314c2284…

MALICIOUS

PDF

78.5 KB Created: 2021-06-11 11:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b26101e6fe14728a945e1a37441ad082 SHA-1: af61446f2e5d07c5e3ff9eed086cfbb8b9ee2c8c SHA-256: 45accfd7314c22846dddb3f498fcfb2c5bed75a2edf2a0d4d9e7feb639884ff5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The primary URL, https://crewmak.ru/pbw?utm_term=different+types+of+massage+guns, indicates a potential lure related to product information, possibly to disguise malicious intent. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crewmak.ru/pbw?utm_term=different+types+of+massage+guns PDF link annotation
    • https://jesidovelagira.weebly.com/uploads/1/3/4/7/134705211/niwev.pdfIn PDF document text
    • https://tukubopanix.weebly.com/uploads/1/3/4/6/134647021/kikakujewuk.pdfIn PDF document text
    • https://bonagimeduvutup.weebly.com/uploads/1/3/1/4/131453121/jetot.pdfIn PDF document text
    • https://texerazijibegu.weebly.com/uploads/1/3/5/3/135302316/vafudu_gimalozinefef_xixidopir.pdfIn PDF document text
    • https://basurujilitafap.weebly.com/uploads/1/3/4/5/134595952/ea4feb1.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/6470d4119eae1d.pdfIn PDF document text
    • https://popoxalisasuper.weebly.com/uploads/1/3/0/7/130775362/9112ea636d5f9.pdfIn PDF document text
    • https://norokeveja.weebly.com/uploads/1/3/4/7/134706326/gutunasuzu_tepufelodekata_lotulutelofex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbfabdb-69bb-4806-a5d1-31b2921af9eb/how_do_i_pair_my_hmdx_speaker.pdfIn PDF document text
    • http://nixefijevumu.pbworks.com/w/file/fetch/144748704/kalugadozawese.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/f/22731386287.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144428013/advantages_and_disadvantages_of_land_expropriation_without_compensation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80570efb-9801-48c0-9db3-9614419547f3/prepositions_exercises_with_answers_for_class_6.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144435951/kupaxugovivixelinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcaca478-72f4-4810-a91e-f50a6a5447e0/lemepozadojowaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f9459f-1800-49cf-ada4-24b14e0666d4/what_para_is_surah_taubah_in.pdfIn PDF document text
    • http://kibumezi.pbworks.com/f/total_body_workout_gym_equipment.pdfIn PDF document text
    • http://latojelu.pbworks.com/w/file/fetch/145123539/report_ppt_template.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/kitakim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2fd380-833b-420d-a3d4-9d8f1e25e40d/graco_snugride_30_click_connect_double_stroller.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/w/file/fetch/144517737/77570332207.pdfIn PDF document text
    • http://gabumur.pbworks.com/w/file/fetch/145123878/zaromajuwuz.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144564852/64942582602.pdfIn PDF document text
    • http://dawanitapix.pbworks.com/w/file/fetch/144650772/need_for_speed_no_limits_gold_cheat_ios.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_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 5292 bytes
SHA-256: a407fecd0f48a93de40838a78546ee7407a8031578c5754863deced2fff5a72b
font_01_sfnt_off000105b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 10728 bytes
SHA-256: da305d5a46cec7837181589dd01892fc9b9bff610ea97c7bf7e7324e32b1e025

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