Malicious PDF — malware analysis report

Static analysis result for SHA-256 548209b5c86c980a…

MALICIOUS

PDF

75.4 KB Created: 2021-01-17 08:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9bd070451001f1e146f51b858ac2756e SHA-1: 2cc7c92f0040b23c9ee7c0035054e41d60c5a472 SHA-256: 548209b5c86c980ab8ea0de08174c482f16ead8587a2e8e8a11aa76266401f51
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 'PDF_SEO_LINK_FARM' heuristic. The primary external URI points to 'https://trafftec.ru/123?utm_term=desert+bighorn+council'. This suggests the document is designed to manipulate search engine results or redirect users to potentially malicious sites, aligning with phishing or content distribution tactics. No scripts were extracted, but the structure and heuristics strongly indicate malicious intent.

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://trafftec.ru/123?utm_term=desert+bighorn+council PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f8a93e758413.pdfIn PDF document text
    • https://jujoxiro.weebly.com/uploads/1/3/4/8/134875196/2524462.pdfIn PDF document text
    • https://cdn.sqhk.co/dizirajeb/pigq5xU/aaron_rodgers_college_team.pdfIn PDF document text
    • https://lumifuwuzuzeb.weebly.com/uploads/1/3/4/6/134698668/lujafasebi.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/dijCicX/megunobitezer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380858/normal_60011519e4e78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369514/normal_5ffdafbc2291d.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/eY2gc1j/beat_the_boss_3_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/ageihid/dirizolizijabit.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/wurulixopif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/patotale/easy_jazz_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/24920876922.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDB 4872 bytes
SHA-256: 3510d1d7308583f28931961f53a435cda2d034a28c3478e50c94067ad66b1d15
font_01_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 10584 bytes
SHA-256: 7c091f64a263c85281672b0c4abfc1a86d9263780e9df581f1ea4b5e70a8081f
font_02_sfnt_off000112c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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