Malicious PDF — malware analysis report

Static analysis result for SHA-256 2634cc48d9abf134…

MALICIOUS

PDF

77.4 KB Created: 2021-03-18 17:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1dc37d180dfbbeaacf8f316f5f2bb9eb SHA-1: 09e3924daf64deff7ff7c7631993efe239048573 SHA-256: 2634cc48d9abf134fe935be8442e42a763864e34e25184c34384d983c300ce5d
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/award?keyword=pdf+split+and+merge+download PDF link annotation
    • http://fitness-ital.fun/97089801095iceyf.pdfIn PDF document text
    • https://xoluvaxabezil.weebly.com/uploads/1/3/4/3/134338990/4585367.pdfIn PDF document text
    • https://nodefosodetapa.weebly.com/uploads/1/3/5/9/135978328/9912297.pdfIn PDF document text
    • http://bbflowers.net/proshow_producer_full_crack_khng_cn5sev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_5fe7248147bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444874/normal_601751b7330be.pdfIn PDF document text
    • https://gimezoribetigaw.weebly.com/uploads/1/3/4/6/134676461/b06c7.pdfIn PDF document text
    • http://whalesqpa.fun/dumalenumozekovirec2j71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367271/normal_5fcf73e912928.pdfIn PDF document text
    • http://svoytrylend.xyz/3427742216yrs0h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_603816b5148c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485313/normal_60524df637679.pdfIn PDF document text
    • https://nuxogisufebodad.weebly.com/uploads/1/3/5/9/135965827/7d659c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5fdda3726f617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_5fe6402baa02a.pdfIn PDF document text
    • http://nesobaka3.xyz/xosametalmz.pdfIn PDF document text
    • http://hot-money.fun/dewalt_3800_psi_pressure_washer_diagram9228j.pdfIn PDF document text
    • http://mastericy-chistoty.ru/poxaxumub91n7n.pdfIn PDF document text
    • http://pixxel.life/advanced_functions_trig_identitieskmjhp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_2f7983fedfc343778b113f3a8135bd87.pdf?index=trueIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_d8c0ab18da8b498eb6c141f59da80c48.pdf?index=trueIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_7ddb6e51d7e74ec79c993b3c6cc2ff5c.pdf?index=trueIn 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_off0000f0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 5456 bytes
SHA-256: d946208c8d7dfcf5d845770dd6ede5aa1d7f6af1188cb55893da01fea4fa2826
font_01_sfnt_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 10760 bytes
SHA-256: 1054762131e4a5cba762f3fc84d4a8f09490d7f60ee86098247a316c81efa1d9