Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ce7c7810119a6d…

MALICIOUS

PDF

98.8 KB Created: 2021-02-12 04:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 70b61e7730c63f969c2a46380619a3c2 SHA-1: 8cfbd9ea36d133ab039579823e1ee4e06e7a4e80 SHA-256: 19ce7c7810119a6d41130fb1a83613b6c0c27c99fd885369bb1e1eba52d929b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link-farming or phishing attempt. The embedded URLs, such as 'https://jottigo.ru/123?utm_term=gloomhaven+brute+x+cards', are likely intended to redirect users to malicious or deceptive content. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

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://jottigo.ru/123?utm_term=gloomhaven+brute+x+cards PDF link annotation
    • https://fakoronad.weebly.com/uploads/1/3/4/7/134712901/2833148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474999/normal_5fe880fc22394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_600b18338d6d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425908/normal_5fe3bb94b7f52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_6003b2c57fb78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_5ff96ac154ffa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463300/normal_5fe0320fa80ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445750/normal_5fc6fe972e6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_5fdaccac7a20d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496381/normal_5fe01e772a4e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447280/normal_6000553979664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiwepatifon.rf.gd/wabirugabajanijibup.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/exercice_barycentre_corrig.pdfIn PDF document text
    • http://jiboleramar.epizy.com/cholamandalam_claim_form_part_a.pdfIn PDF document text
    • http://golujaxi.epizy.com/komutinidut.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_off00014586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14586 5476 bytes
SHA-256: abf642149f56c5edfb733910202ed2c775fda56b89c4b765f6a8b7ada7f1abb5
font_01_sfnt_off000157fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157FB 11264 bytes
SHA-256: 46edd8272fa221602192fdf4d44eb28f0cba8268b8640e9151bd7ce7ebfd2936

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