Malicious PDF — malware analysis report

Static analysis result for SHA-256 333311968af40aef…

MALICIOUS

PDF

81.8 KB Created: 2021-04-28 19:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d481a70dd6faf1ca6cbbf8603ea9ff2d SHA-1: 76ebadc05537909894cf58db853a9bbcd7590858 SHA-256: 333311968af40aefd130ad46e9280691aa2f7857da7540c0d4fe8fd854d4c71a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM and PDF_URI heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=cloistered+scholar+dnd+5e
    • https://cdn-cms.f-static.net/uploads/4494165/normal_606928e87bfab.pdf
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/sisupiwexopawoli.pdf
    • http://getallcreditscores.info/alice_in_wonderland_excerpt5wphn.pdf
    • http://klosheff.xyz/xedotepokelafeeykig.pdf
    • https://numetigovav.weebly.com/uploads/1/3/1/6/131606493/ronob_welibomawup_migagovuxa.pdf
    • https://cdn-cms.f-static.net/uploads/4494431/normal_603270a959ca5.pdf
    • https://cdn-cms.f-static.net/uploads/4481065/normal_603804ffdad47.pdf
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/4410579.pdf
    • https://cdn-cms.f-static.net/uploads/4477373/normal_602e9f228947b.pdf
    • https://pudewufaziv.weebly.com/uploads/1/3/0/7/130739775/jozisoxuduvuxaf.pdf
    • http://kersita.space/washington_post_horoscopepgy0t.pdf
    • https://madugonado.weebly.com/uploads/1/3/2/8/132815119/46109.pdf
    • https://cdn-cms.f-static.net/uploads/4373987/normal_6031feb129b88.pdf
    • https://cdn-cms.f-static.net/uploads/4420244/normal_602e48bb06dbf.pdf
    • https://boxijapemisavar.weebly.com/uploads/1/3/0/8/130874030/ledetozem.pdf
    • http://hotloveme.online/novulavapewirozysbf.pdf
    • https://cdn-cms.f-static.net/uploads/4403557/normal_6055cc6797ee8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_e13c307678f9416bac54631e4908dc2b.pdf?index=true
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_7fa0f86da98f439b95e1290c11a1b12d.pdf?index=true
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_e7f4ce5db63d44729d493680e6c5f40b.pdf?index=true
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_8d16f6d2bed841e28c0bb5bad22886fe.pdf?index=true
    • https://16b16ea1-1eac-4681-bfdb-39d0b7b0c60a.filesusr.com/ugd/d6b497_819972a0a7fb45abb93b72c01a45426c.pdf?index=true
    • 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_off00010361.bin
016767a25ff2b19fcdf7a098c1b7d92d4353a483d70b8108fbf7686837c45cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10361 5056 bytes
font_01_sfnt_off00011486.bin
ce27cbe1f9059e13f78f58e099abeb0d6a6ca2b765d9f9b85cb60612f7cc0830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11486 10952 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.