Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b7de0579cf12a7…

MALICIOUS

PDF

68.3 KB Created: 2020-12-18 17:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c1463ede51fd951c7a6debc707f6c262 SHA-1: 7689af4f6d8e4ad2f09409ea12f259b351bb3978 SHA-256: 34b7de0579cf12a7360fb2ebb5935af1ac0ae570232a91bb683e45f15791d37c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to various PDF files, including one at 'https://s3.amazonaws.com/nuxomigo/nipel.pdf'. The primary malicious URL identified is 'https://trafffe.ru/123?utm_term=how+great+thou+art+hymn+ppt'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=how+great+thou+art+hymn+ppt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5f9a8fea297ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5fd8b3d6e926b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_5fae08f47a09f.pdfIn PDF document text
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/wedofewurorugazisi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417137/normal_5fcc9ad4a1611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f8db5a015e28.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/nuxomigo/nipel.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/logo_quiz_level_answers_12.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64f06116eb00e3c70da9e/t/5fcca4c00ab5d62febedb135/1607247040612/guboriwafinaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/29870979818.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee64e94f25741fd49f96d/t/5fd0c4b112264b5dfdd3f18b/1607517365238/ark_survival_evolved_cheats_xbox_one_creative_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/zanomolixul.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_off0000cbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEE 5180 bytes
SHA-256: f9a676f8704e1824d6b5921cc7f1026aea720f130e42a7d9d54e2c581d6a4b1b
font_01_sfnt_off0000dd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7B 12040 bytes
SHA-256: 6498f89e9622aa61624150171689d719c36cff7df25b600813af1281d1d82f78

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