Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2e3ab32e06b995…

MALICIOUS

PDF

78.0 KB Created: 2021-01-08 15:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a033d0c27cf29fdfc187308e3c50f426 SHA-1: 735e129ca4c65ae8d6ec0b24f28abef4ec84b5db SHA-256: 9c2e3ab32e06b995a8dcb8add5711b0d9a4c56173c6024ebf1bfd616aaeba180
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, directing users to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

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://trafficel.ru/123?utm_term=go+c5+82e+baby+gate PDF link annotation
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/2162271.pdfIn PDF document text
    • https://desemezek.weebly.com/uploads/1/3/4/4/134458593/4539455.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/WjjHghN/doon_defence_academy_cds_fees.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/lovasibazor_mifafisavutoj_vadokez.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/1zjb5Tp/93881260343.pdfIn PDF document text
    • https://mavevataxivira.weebly.com/uploads/1/3/4/6/134600118/xopewapugubuk.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/goviwigax/poster_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/entrepreneur_s_guide_to_law_and_strategy.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/nawalijigovanegedarufuli.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/arabic_alphabet_chart_with_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144cbdef-ea83-4a99-94fd-8eacdc6e4cdb/xikumenomev.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/18654955060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd046fb9-132d-494a-8669-cb5651044822/ejercicios_de_diagramas_de_flujo_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/xomoviwuzeviwitumuni.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_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 5384 bytes
SHA-256: c43ab8ec922ab57333a4ff12d2fe0dec3f9856987c83f56325ec3764bcdfa266
font_01_sfnt_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 10288 bytes
SHA-256: 7d625cc5aa2a480e0da4e80363f46ac2aa322d1a8123313214e491838bbee0e7

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