Malicious PDF — malware analysis report

Static analysis result for SHA-256 294f0ebce6ddeb4f…

MALICIOUS

PDF

67.9 KB Created: 2020-11-25 22:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 80876e2a2f8dd1ea797325344f908807 SHA-1: 31e73ea220db3bb3be037ca84189030982d339af SHA-256: 294f0ebce6ddeb4fd14f63a81711919b731f543ccad0e9d319a8debe9ac01e1e
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to suspicious domains, and is flagged as a malicious redirector and link farm. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=batman+arkham+asylum+riddler+trophy+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_5fad2d0a011c6.pdfIn PDF document text
    • https://batatifenosi.weebly.com/uploads/1/3/4/5/134513642/26f995cd1e0.pdfIn PDF document text
    • https://zufopawel.weebly.com/uploads/1/3/4/4/134462865/nusid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5fa8036e8187d.pdfIn PDF document text
    • https://mawajajapok.weebly.com/uploads/1/3/4/3/134353668/5625801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_5fa5fadc693e8.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/niroselubesibaw.pdfIn PDF document text
    • https://maminimavuzi.weebly.com/uploads/1/3/4/6/134640728/5189791.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/zuponefi/45796575165.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/82501209815.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/89260889227.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/dilizakixomow.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/texevozajapitukorej.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/metro_2033_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/wupaloxene.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_off0000ca4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4B 5588 bytes
SHA-256: cefd2ec09f1bb3a0bd3ea3c3514589e42051457007382a6833ad0885473b2772
font_01_sfnt_off0000dd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 11188 bytes
SHA-256: bdb40704f91ad9ad92a085411ee9a853a6be3d205a0998fae71c1b58c3bc1f97

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