Malicious PDF — malware analysis report

Static analysis result for SHA-256 727eaa14f458a10f…

MALICIOUS

PDF

73.1 KB Created: 2021-02-03 01:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 678493c431b37d444ba0d062c52b6425 SHA-1: d44277de0e0c8285411a5c7a039dbe7c6687238b SHA-256: 727eaa14f458a10f62c8b44a9ff4d0258e0bc69aaffc07872c1e830aed66b4eb
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'bologen.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'email template freelance work', aligning with a phishing attack pattern. No scripts were extracted, but the presence of embedded URLs and the overall malicious verdict strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/aws?utm_term=email+template+freelance+work PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416149/normal_60010c623a21a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_600ffe1bd640b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419002/normal_600396da6db9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_6004bab25a268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5fd2cb153ec6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453741/normal_5fff128b601d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_600727c8a8e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_600e5c2fcce86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5fd3c5bf963eb.pdfIn PDF document text
    • http://topshops.website/bc_high_hockey_roster_2018-_196xud9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_6014d935cff10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450426/normal_6019786507595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422640/normal_6007716b695ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5feb040e6c2c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_600a1621810df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_6016c3ef07cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_600e65e229b1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380083/normal_5fdec495294a5.pdfIn PDF document text
    • http://teren.fun/textbook_of_assisted_reproductive_techniquesf5wl8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 5096 bytes
SHA-256: 1e2a07cfc7a0f442d118e684deebeb375306d0b1e04f91c470d606fd6a357f4a
font_01_sfnt_off0000f185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 11036 bytes
SHA-256: 4b452c5061e04da118a44b1184f0d073c417f9028c0a8f7f71e017b9a61a24d8

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