Malicious PDF — malware analysis report

Static analysis result for SHA-256 e300579956cc8538…

MALICIOUS

PDF

60.5 KB Created: 2021-02-20 22:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e5b781aaf7f9b945b230171af11d07bc SHA-1: e44e0295944ff7307c01bf4a276110acc25eb57e SHA-256: e300579956cc8538100d86c7d19a06637fe74aa997234dfb9cff3a338a0a9b6c
214 Risk Score

Malware Insights

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

The PDF document contains embedded links designed to redirect users to malicious websites, masquerading as a TV manual. It also functions as a link farm, hosting numerous external PDF documents, likely for SEO manipulation or to distribute further malicious content. The presence of a critical redirector link and ML classification strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://crophysi.ru/strik?utm_term=vizio+m322i-b1+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_601bb51025d25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5ffbbe7a23349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479237/normal_5ff870dca9be5.pdfIn PDF document text
    • https://jovonawokemurif.weebly.com/uploads/1/3/4/6/134678447/37f50.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/zominimejax.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/aidAh1q/10266068133.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/kgdjaFw/53413959221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471240/normal_5fc582b1797ed.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/dixaleko/21658234869.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/28891697575.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/34595103203.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/mimil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB031 5092 bytes
SHA-256: 0cfb6942d01f330c3c4596f9bf1f82469db0321696abdc45b598d745afc19b42
font_01_sfnt_off0000c189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC189 9956 bytes
SHA-256: 44d9e28d764bf8fc8aee9987e5ad94e4ac3e78e244296dcf22b8a2580ec0e957

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