Malicious PDF — malware analysis report

Static analysis result for SHA-256 35bbf002e5d26f78…

MALICIOUS

PDF

66.8 KB Created: 2021-01-10 14:16:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3738a814e9f05822620e023e099a550b SHA-1: 9546f8c4b08ae3e8b665fc643f3c42fe98ccc589 SHA-256: 35bbf002e5d26f78394f078722b302019ba620b18c339834b689858ad4a03ca5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation and potentially phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious or deceptive content.

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://trafftec.ru/123?utm_term=citra+3ds+roms+pokemon+x PDF link annotation
    • https://site-1168290.mozfiles.com/files/1168290/ranked_data_meaning.pdfIn PDF document text
    • https://sifuzulujiw.weebly.com/uploads/1/3/4/7/134716539/b6b7329.pdfIn PDF document text
    • https://site-1223295.mozfiles.com/files/1223295/77598671950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fb3c9612762f.pdfIn PDF document text
    • https://site-1168118.mozfiles.com/files/1168118/54812825084.pdfIn PDF document text
    • https://site-1176681.mozfiles.com/files/1176681/79813680771.pdfIn PDF document text
    • https://site-1195739.mozfiles.com/files/1195739/pofiwaborejotuduz.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/lixasifasi/zuvosarifutowap.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/landis_gyr_e110_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/94770510170.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/beautiful_now_remix_song.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_off0000c5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AE 5276 bytes
SHA-256: 44daf71ba469b68951a1a6a8e80efed9b8ebdfab3a460e812b15000f19663620
font_01_sfnt_off0000d787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD787 11340 bytes
SHA-256: 723a2c94cacb6f0e7ef3191fc5806241ec576fa408d94d4118874968d5b52b29