Malicious PDF — malware analysis report

Static analysis result for SHA-256 adda617b036b5fa9…

MALICIOUS

PDF

62.1 KB Created: 2020-11-24 04:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c606aa3bd96cd0e2e7ea50bee7d7a52e SHA-1: ec30f1c2d09c4d090e40cc61400a6b1572f3b465 SHA-256: adda617b036b5fa9e33503c8a327eb9e2bba8dc7ddd761474f8ce97d0e313189
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to manipulate search results or direct users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/123?utm_term=norman+rockwell+figurines+self+portrait In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_5fabb3bcb9c80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5fa96bf4a0c33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f94a9dccaa4a.pdfIn PDF document text
    • https://lepuzabokagat.weebly.com/uploads/1/3/4/3/134333079/1007ecba3ce4908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_5fb25ee49c007.pdfIn PDF document text
    • https://ganarusi.weebly.com/uploads/1/3/4/1/134109047/gizediroxujunen_titopisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f9a0b6ce32c2.pdfIn PDF document text
    • https://kigibituridugu.weebly.com/uploads/1/3/4/3/134352406/senebugakatifopu.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://gewusepisegetu.weebly.com/uploads/1/3/4/4/134492884/4794a4aa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_5fbc61c204f04.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/tetazino/80817386681.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/98770140617.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/alimentacion_complementaria_blw.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_off0000b335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB335 5460 bytes
SHA-256: c60186bdc7dfbeac2eaf42d112ba98f3234afbdfd4358639ef695823f260996a
font_01_sfnt_off0000c5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D2 10892 bytes
SHA-256: 511cf3090253039bb0f9b0e4a27613a7e7e447780410e94235bb5d91e3af59af

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