Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea3791cec46c6f7…

MALICIOUS

PDF

82.2 KB Created: 2021-04-26 18:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c380183415502fe8f056d1663cea7fe SHA-1: d4030933444c443f01869a79f8db4bef36740cdb SHA-256: bea3791cec46c6f751c3b56e4014ad80664d394d486773d951c9b75ec90e7d74
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or content-distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=weight+watchers+digital+body+analysis+scale+review
    • https://cdn.sqhk.co/zulatobi/fjbijib/cute_pomeranian_puppy_wallpaper_hd.pdf
    • https://cdn.sqhk.co/kelulegawi/pogiXSJ/dobedovuxopib.pdf
    • https://cdn.sqhk.co/gudijupimeb/hj7idEQ/pilulalojiwuw.pdf
    • https://cdn.sqhk.co/nilesatu/hJphhUm/jurassic_tribes_cheat_codes.pdf
    • https://cdn.sqhk.co/papazokixe/aumRieb/dejizizilepadibevazixa.pdf
    • https://cdn.sqhk.co/gujipiror/8zN8gfi/bike_racing_free_download.pdf
    • https://cdn.sqhk.co/nowonipewo/jfibYjc/free_christmas_ringtones_for_iphone_8.pdf
    • https://cdn.sqhk.co/wawabosamugo/iPt1fqf/wowelapeniduwulobaw.pdf
    • https://cdn.sqhk.co/wufevinek/Cthb5xv/pufemaxabepewevom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lobopekogolo.onlinewebshop.net/savebuwalerebusifiwobede.pdf
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_d51dd90be0804fc59052aed6d19de702.pdf?index=true
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_b0190fe9c172488bb0d88e8aa5158713.pdf?index=true
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_dada202fd965450c8a191ddd7adac003.pdf?index=true
    • http://kutoxinupuroxo.onlinewebshop.net/multivariate_analysis_hair_download.pdf
    • https://2cc935b2-b854-4d3d-8499-e3bac5ec7384.filesusr.com/ugd/2e82fc_1d9c002464384c57ab2af9656f9df11d.pdf?index=true
    • http://belibivizonojo.myartsonline.com/53400659397.pdf
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_e86c22852d6f4a80b041208a82f53671.pdf?index=true
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_08e19ba20a7d47d0b4007ebe6934ff6f.pdf?index=true
    • http://ralirajuz.atwebpages.com/how_did_odd_thomas_die.pdf
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_35e0ec3764e44914be7043e2f1005854.pdf?index=true
    • http://ruvemad.myartsonline.com/valisotuvawobada.pdf
    • http://nabenejajoko.myartsonline.com/desktop_support_engineer_resume.pdf
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_7544c72326ea4841aeac9ab482bb2670.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_off00010250.bin
af727e9feb7080c6627b2d4e8798aed9c1b9b84346f8daf4a77d5ff024a580cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 5608 bytes
font_01_sfnt_off0001157e.bin
f166aaec9656e066139ab8b44255a967417eff4e7ef64040b09677e3f063b60f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157E 11064 bytes

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