Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3bd24483c5e544…

MALICIOUS

PDF

93.8 KB Created: 2021-03-19 05:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c3e77f8e74eb5965da4ac542bd8d6ad8 SHA-1: d08c3e3e457b3b15486ff3cf03c7793676e53be2 SHA-256: 6d3bd24483c5e5446d4b971da9bd2e9960228c06edecb6c877d356847a500968
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, suggesting a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and numerous external URLs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/wix?keyword=religion+study+guide+grade+12 PDF link annotation
    • https://cdn.sqhk.co/xosaletozobi/pf7x3wU/factors_affecting_test_validity.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzivogawa/rXjcAih/hotel_formule_1_villeneuve_le_roi_orly.pdfIn PDF document text
    • http://momuloteseze.22web.org/test_for_non_reducing_sugars.pdfIn PDF document text
    • http://bumosid.getenjoyment.net/82582040786.pdfIn PDF document text
    • http://mufajaku.medianewsonline.com/rejofadekewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368487/normal_5ffe9c279dc7f.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/DmWigmK/pitbull_dog_hd_wallpapers_1080p.pdfIn PDF document text
    • http://tudilevu.22web.org/91416839145.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/gdjfhj3/setupibitidamolekapik.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/75956562545.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dcW0IS4/zuruze.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/anatomie_du_pied_et_de_la_cheville.pdfIn PDF document text
    • https://cdn.sqhk.co/mowamukar/hgdMvPc/vasojivaseforozowomiw.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/acid_rain_introduction.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/aMyR2Fv/small_rc_glider_plans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478123/normal_5fd672f527a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425912/normal_5fe8c354f08ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_6010530a8cbca.pdfIn PDF document text
    • https://cdn.sqhk.co/rogumabutur/KjfJibG/itel_mobile_dialer_code_for_samsung.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_03a9c54557c24411b88fae504d2dec90.pdf?index=trueIn PDF document text
    • http://gedijusopekud.epizy.com/22316063843.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_c4aee50157b643c0b93fe83f21a46ac0.pdf?index=trueIn PDF document text
    • http://bujoraz.rf.gd/napubisexodaxunivanek.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/adobe_xd_free_templates.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_off000130ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AB 5284 bytes
SHA-256: 25c86fb85dd5efb280c2fc31ce801a7f07177998ad356a3b9b4a42f871231c2b
font_01_sfnt_off000142c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C1 11612 bytes
SHA-256: 6909a2123719c8172c49c390a95a6b02c9e627520840e42b29be463d61cf3de6