Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f172a4baed27dc…

MALICIOUS

PDF

70.4 KB Created: 2021-01-10 03:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e6c20fd7ce80b8741bd37084e84176b1 SHA-1: 99ab537e9c66e336356902f5f65fcca9981aa49b SHA-256: 71f172a4baed27dce2c85c43e17778fa8b6c43497f299717b47d6dbf7874549d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, likely intended to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=partes+de+una+llanta+de+un+carro PDF link annotation
    • https://cdn.sqhk.co/feripamapuv/ggPicgd/rakumupunuzijo.pdfIn PDF document text
    • https://cdn.sqhk.co/doxurozupu/iRhggfW/81049179897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f870321509a4.pdfIn PDF document text
    • https://genoduvule.weebly.com/uploads/1/3/1/4/131407197/luzeluduf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fad5c11734aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5ff0ea7bcea88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5fe428c68f48a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_5f96b558eea92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417040/normal_5fc2b64b90959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_5f94917a37136.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/jujaxukupeka-lifem-katitetaz-nuvid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5fa309c39e8dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f8b439f1cec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_5fa3cca1ef38b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497131/normal_5fd136ffb3ed8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 4936 bytes
SHA-256: 5202ef1ac40043329713117a4e30c9bb68f3521d6c818dcbfc8f074acea1004e
font_01_sfnt_off0000e7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C9 10800 bytes
SHA-256: 9746e65afce929378ca9d94cabf978ac09936dedcbebc7b2c7927c1fdb83f771

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