Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a936ddbe66e96ad…

MALICIOUS

PDF

68.6 KB Created: 2020-12-03 17:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9083dd34bae9380541b1f8f012570d6f SHA-1: 1e3e40c8dc9cd3ae4318e0d3d7d4b48d362e0b7f SHA-256: 8a936ddbe66e96ad5126cef1da4a5e672c56324b2cc43a0cc931059d771d83d5
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting services and redirectors, indicating a link farm designed to distribute malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and numerous links strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=rig+veda+pdf+in+marathi In PDF document text
    • https://nukewixe.weebly.com/uploads/1/3/4/3/134385223/tanivorofadeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5fba67d75fed2.pdfIn PDF document text
    • https://warimeso.weebly.com/uploads/1/3/4/7/134720830/buzekamolera_legorax_juvevutog.pdfIn PDF document text
    • https://jijalasigode.weebly.com/uploads/1/3/4/3/134344414/2358381.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/916016.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/c5dcbb3f5f7ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5f9e0cadd4725.pdfIn PDF document text
    • https://jameguvifipud.weebly.com/uploads/1/3/4/7/134771166/1276464.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/1793513.pdfIn PDF document text
    • https://vaputonusodi.weebly.com/uploads/1/3/4/4/134493057/5e31522cdcb1360.pdfIn PDF document text
    • https://tenetowebobidiv.weebly.com/uploads/1/3/4/6/134635535/1c65dc19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f9a6931e9eff.pdfIn PDF document text
    • https://werovowota.weebly.com/uploads/1/3/4/7/134766705/5442203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vufupu/garubuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a69768-84f1-485a-bc6f-fbe63dde8929/human_resource_management_mathis_15th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89acf150-f6e1-45a5-8477-5cd0b3c25ab1/muslim_wedding_dresses_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/destro_lock_pvp_guide_5._4._8.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_off0000c234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC234 3144 bytes
SHA-256: 100a28dd242565e8b8bb46a533e32c6853beb1ff253c5d6f184f24f5888b1de7
font_01_sfnt_off0000cd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD71 5312 bytes
SHA-256: 7ecca5b4b666f9795c36ede8630a401bffe85690f7d1cdbb484cd47504e5bdd3
font_02_sfnt_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 11504 bytes
SHA-256: 7db812a2aeb7d327e1f4a39b797656127efa283d8e64c305309ad5f22dc9e152