Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed94d5512c3b890d…

MALICIOUS

PDF

71.5 KB Created: 2021-01-24 07:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 84062d080925fe3d419dac686c5c4734 SHA-1: d89901a56c7dd95ebca6334cc0d058ad189acf56 SHA-256: ed94d5512c3b890db0702a896b9ebb7da8a46c7a7126a5ade44b1568f30bf354
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest it functions as a link farm, directing users to numerous external PDF files hosted on various domains, likely for phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

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://trafficel.ru/aws?utm_term=begana+old+movie+song PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378406/normal_5ffd7cfe9a8b4.pdfIn PDF document text
    • https://wabodaji.weebly.com/uploads/1/3/2/6/132681772/85b1989a52a.pdfIn PDF document text
    • https://benanuvez.weebly.com/uploads/1/3/0/8/130813453/keluzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_5fd37c45d3408.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427080/normal_6004fc5988d8f.pdfIn PDF document text
    • https://zoradelageruwol.weebly.com/uploads/1/3/4/5/134591251/5070855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388422/normal_5fccb7c921631.pdfIn PDF document text
    • https://mafupalitofix.weebly.com/uploads/1/3/4/0/134042392/jeviwumiwe-pixufik-jikonupapa.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/3e092b49e7bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383929/normal_6007a6b732f20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390374/normal_5fdd5ecae86c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_5fe9a902adf2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5fe01247cbf36.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/lojinujib_juxoputepap.pdfIn PDF document text
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/ninegibunisuvek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xivegujox.epizy.com/48945928406.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_off0000d97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97D 5156 bytes
SHA-256: f33de96c84bf6cac9613ed6153e1e4d2d553499dba54f681e84b9b2eefbd7243
font_01_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 11532 bytes
SHA-256: 7b8021d9bef4408ed2b567365190835635b3e1c1373e6f4e902623d2538ac20c

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