Malicious PDF — malware analysis report

Static analysis result for SHA-256 44373b02e11b2ace…

MALICIOUS

PDF

86.3 KB Created: 2021-06-02 20:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8beca4c2f63846b0751576ab5dfa04f1 SHA-1: 485f4fe1d305d17c9973eec058cfd7bb8b301342 SHA-256: 44373b02e11b2ace73aa8d50164de182462e0ccf601e4a0aa78033def4b1af9a
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', with the primary suspicious URL being https://garglob.ru/pbw. The document's structure and the presence of numerous links suggest an attempt to direct users to potentially malicious or phishing websites, possibly as part of a broader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/pbw?utm_term=made+in+tokyo+atelier+bow+wow+pdf
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/89e24c7627f11f.pdf
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/adc83cd07a3af2c.pdf
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/d4e03ef75a5131.pdf
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/vulukixesepov-nunisab.pdf
    • https://lixamekosig.weebly.com/uploads/1/3/4/3/134368733/tubatuzaruv.pdf
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/f613e0c125.pdf
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/61c27e73f762.pdf
    • https://cdn-cms.f-static.net/uploads/4485313/normal_605fb6f1c0f8f.pdf
    • https://cdn-cms.f-static.net/uploads/4367903/normal_604491d981f01.pdf
    • https://xonalofogikovor.weebly.com/uploads/1/3/4/3/134372302/loboredab.pdf
    • https://tajamexuzoxobug.weebly.com/uploads/1/3/1/4/131410736/0395b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kufujibumufa.pbworks.com/f/63484349187.pdf
    • https://uploads.strikinglycdn.com/files/a09af53c-6a72-4721-8a6b-f46aaf750a31/62065384121.pdf
    • http://risuxujuvu.pbworks.com/w/file/fetch/144517761/ccna_chapter_8_quiz_answers.pdf
    • http://xosufixemuf.pbworks.com/f/wekeboxodasoriwaxafu.pdf
    • http://sisagexal.pbworks.com/f/jevanorerubomojosu.pdf
    • https://uploads.strikinglycdn.com/files/ceb67d30-6d7c-4132-9e6d-9ab4d5ada823/gijetomezujufik.pdf
    • http://tukufidanega.pbworks.com/w/file/fetch/144425787/21062573550.pdf
    • http://godekazonigi.pbworks.com/f/nulls_brawl.pdf
    • https://uploads.strikinglycdn.com/files/5fffc334-b4cc-42dd-bcdd-63dca79858c1/animal_encyclopedia_for_adults.pdf
    • http://xibosini.pbworks.com/f/migexiwekekibasag.pdf
    • https://uploads.strikinglycdn.com/files/d494b961-e971-4ca4-bfe1-24ec593a0024/how_to_reset_maintenance_required_light_2001_honda_accord.pdf
    • https://uploads.strikinglycdn.com/files/3f67d7d9-769e-48a6-a8f4-ccfcd9c2de5d/mupakawaradolote.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001113f.bin
5c745914e8861541777df980ad4075eb55197b36fb473c3c7adb10990224fc98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 5260 bytes
font_01_sfnt_off00012357.bin
82ebd6a032a991b1c7a81a6ac24e9655f04c8754bbd490d1b78f01d52652a609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12357 12564 bytes

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