Malicious PDF — malware analysis report

Static analysis result for SHA-256 c250bd4614ee18b5…

MALICIOUS

PDF

64.1 KB Created: 2020-11-24 07:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f27ea0d220a0820ccd0dd0ef5c760c47 SHA-1: 70ae9353dea9d16ab21a235834f899253e965179 SHA-256: c250bd4614ee18b5e84ad2c19249ded37d87db29a05f73bc499121d3916aef21
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary malicious URL identified is https://trafficel.ru/strik?utm_term=princess+agent+season+2, suggesting a phishing or malicious content distribution attempt. No scripts were extracted, but the structure and numerous external links point towards a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=princess+agent+season+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f96f3efa61b9.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/5984000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_5f9c7f95ce7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412908/normal_5fb91caf68d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_5faaf300cad25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5fa710fa46e88.pdfIn PDF document text
    • https://fobibopokigafo.weebly.com/uploads/1/3/4/7/134702456/xogul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_5f8e50622cd6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fbc178187fde.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/gidibesuxi/adjective_and_adverb_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/cabin_fever_3_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/24540808011.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/davenatariputibasipot.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/36514707385.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/10128710937.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_off0000c37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37B 5068 bytes
SHA-256: d7b7851d738202e429d587939069d1e067785696c11565229b2adcdd1c5c7b55
font_01_sfnt_off0000d4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CE 8972 bytes
SHA-256: 30b67d57698c2e065f5a51186f538869e075e213b3daec9d1de30c800071e18b

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