Malicious PDF — malware analysis report

Static analysis result for SHA-256 0679262689d2b317…

MALICIOUS

PDF

83.2 KB Created: 2021-02-25 09:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8f887979a57547dfe516380754d41351 SHA-1: 49f0575361554dc8d8efe0773c5fbcfb2905a91b SHA-256: 0679262689d2b3178001a064dfa0c2ec502de640cfcd5ef88bfe8aa395a89a8c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to potentially malicious or SEO-abusive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/wix?keyword=burning+sugar+cane+smell PDF link annotation
    • http://jirafka.space/headache_when_having_sexhnark.pdfIn PDF document text
    • http://yoga-fitness.space/mi_launcher_apk_downloadnve2b.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/f826436b66f2.pdfIn PDF document text
    • http://wwnews.site/lyskamm_4000_guide_alpineg9u5c.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/fosalizuzu/arifureta_web_novel_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/20467952893.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/59916479510.pdfIn PDF document text
    • http://wavedada.epizy.com/chok_chok_holographic_sheet_mask_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/tixitakijixezowugud.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/69552558914.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/5485085808.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_off00010ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB9 5168 bytes
SHA-256: eaa3eb76021a81c5eb10d91901eda9238f67bc597dbf550780135a162e21dd5e
font_01_sfnt_off00011c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3B 10704 bytes
SHA-256: c1f9e306847677bf2caf8f918143866a1a8400a9b3124ba2e3520f5adef5f804

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