Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de6d2f26276ecda…

MALICIOUS

PDF

93.5 KB Created: 2021-03-02 19:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 45304829dada892f39d853fa1e30ef42 SHA-1: 3b93d8db7c48f21895c74456fccbc4510f738942 SHA-256: 2de6d2f26276ecdaaf28a7e71f298cd32383e272d71763c9a31ca79ee88ba17b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to what appear to be SEO-optimized content farms, suggesting a phishing or spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious link 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
  • 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://druttle.ru/award?keyword=cuisinart+dcc-3200p1+perfectemp+coffee+maker+14+cup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382953/normal_602ae5718755e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_601233edbddf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5ffbb79a294e3.pdfIn PDF document text
    • https://rozozejowetape.weebly.com/uploads/1/3/4/5/134510424/giribelenuxifijuwobo.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/2007440.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488569/normal_6008d6cbd335b.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/kezabulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_5fef197849ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_5fd9e4a987c76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450640/normal_603b3fb51c7e8.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/rufonali/vitemogajisadetivabu.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/informatica_etl_testing_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/ali_g_indahouse_2002.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/vulegavunuj.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/bloons_tower_defence_5_free_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/16877376939.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/linear_and_nonlinear_functions_worksheet_8th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/2013_dodge_charger_srt8_lug_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/calendered_sheet_metal.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_off00012f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F66 5848 bytes
SHA-256: 406b27d5b91a4b059d5d1d557f5876730bad640cc3fed5b908efd9307ada3ba6
font_01_sfnt_off0001434d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434D 10784 bytes
SHA-256: 8fecda444a8c88e08346f93c3134843c0bd88bd27028dbec22a0ab0deaa89341

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