Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd4b2fb47f34b31…

MALICIOUS

PDF

95.4 KB Created: 2021-06-12 11:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0d4beaec81622b7efd6ab2ccbcc6c986 SHA-1: cc76f03665ad7094761d7128109c3f5005813806 SHA-256: abd4b2fb47f34b312a55ab8570e1b69148cc1adfea2aa7ce0b9f3ed8f4233f79
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are common in phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://garglob.ru/pbw?utm_term=yaara+ve+movie+download+filmyzilla PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461232/normal_5fd2fd61ef977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481676/normal_605b685a88ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_6056c7bc9c40b.pdfIn PDF document text
    • https://tovibimatajo.weebly.com/uploads/1/3/5/9/135963052/vanewifiwuwejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_605871f1b4f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_60484cb1c76c5.pdfIn PDF document text
    • https://vawemuziz.weebly.com/uploads/1/3/5/3/135351027/safobego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371790/normal_5ffbbac06ad9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473638/normal_604aab86db91d.pdfIn PDF document text
    • https://giwulotasika.weebly.com/uploads/1/3/1/4/131411199/c68f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452607/normal_60652c278b84e.pdfIn PDF document text
    • https://botironolimuvot.weebly.com/uploads/1/3/1/3/131380397/5104021.pdfIn PDF document text
    • https://pudijubo.weebly.com/uploads/1/3/4/3/134311311/3a686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416938/normal_605ee8bdb26ad.pdfIn PDF document text
    • https://ladukupubavar.weebly.com/uploads/1/3/0/7/130776836/1627499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480579/normal_605c64a43f652.pdfIn PDF document text
    • https://bupogoduvokog.weebly.com/uploads/1/3/4/6/134690502/gusumawozivotiraxoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edd42b3-5f8c-49be-b0dd-78cbea930b70/jakonibabepatupep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8924fb-d10c-469f-8e4a-42fc62594d84/management_information_systems_degree_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa773ec7-2dc9-449b-acd1-ce999e1bc4a7/jokufajirazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e25f64e-b393-4220-904a-ca554f32d08f/binomial_theorem_examples_with_square_roots.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa82de8-71ac-4aed-a521-b27c48ebcd80/how_to_install_rear_window_perforated_decal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed94c301-f2c2-4f88-9494-9ccf288376e4/77050643491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c8fb19-00bd-480c-be15-26bc9d8398f3/niv_study_bible_app_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9bb9b9-a0b6-4c6f-a01e-ef9fa1c16eb5/76529531875.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_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 5140 bytes
SHA-256: f4b415e8ef7982e8d72beac16622f614278917659e39fe181570f892274029a2
font_01_sfnt_off000119e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E3 10932 bytes
SHA-256: a062fae5c2c5a82136b15990e31873b52ce6ed3d836c7dfd0b92ca927f902e75
font_02_sfnt_off00013f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8C 16152 bytes
SHA-256: 3476b112f299813a3e9ce6239df82ee921838b018304979a30e35e2daa74aa3c

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