Malicious PDF — malware analysis report

Static analysis result for SHA-256 8684215bbd34b5ed…

MALICIOUS

PDF

105.3 KB Created: 2020-12-28 18:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e2ea95235c148144bfc53d66cd4ec034 SHA-1: e92f91dd6068d56c964b5c6ba76626fcf0329218 SHA-256: 8684215bbd34b5ed25af7373583676e457d0310e63c632636f813d60bb3ece6d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious activity, likely related to spearphishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/strik?utm_term=teacher+salary+nj+per+hour PDF link annotation
    • https://cdn.sqhk.co/vofaruvukuk/jayafR5/.pdfIn PDF document text
    • https://cdn.sqhk.co/nukuzulu/vgdpjbj/58913021527.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/jjhfno1/29891052872.pdfIn PDF document text
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/lubuxaminofiti_tifuwafesafuju.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/ggjhdOE/big_boy_pants_cartoon.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/sedefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5f9aec596c15d.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/5vxRLjc/76099800170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dowavelaxam/construction_maths_class_10_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/95574325974.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/fludrocortisone_side_effects_in_dogs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d33ff89-2a59-4853-b1ca-50b0f3db4af1/nutawavurirugovaterina.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/blood_on_the_ice_skyrim_examine_crime_scene.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_off00014daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAF 4904 bytes
SHA-256: c6d3f777253d21601cb313094afbe1134b849cc7b26c641b1c950d914fc4af35
font_01_sfnt_off00015e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E56 14224 bytes
SHA-256: 4f3349b447b1312fb3a693a2d0f546ae874eb94afe704c24408e819a3a051472
font_02_sfnt_off00018a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A20 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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