Malicious PDF — malware analysis report

Static analysis result for SHA-256 750ecb5888e0d0ef…

MALICIOUS

PDF

73.8 KB Created: 2021-02-14 16:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ffd588c2264318033f3f81e8cd54051f SHA-1: eb9d62d518891255d0c328f6dda145747bfdbe59 SHA-256: 750ecb5888e0d0ef6fb4f90fc3a682364b92f8c1b69ded2e0b876190f3f11a20
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/123?utm_term=camp+creek+middle+school+fight PDF link annotation
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/3268c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_6011b7827d63c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_5fd8dd4315172.pdfIn PDF document text
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/gunemomar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_5ffd299bc0fb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ff6666339987.pdfIn PDF document text
    • http://kubevevof.iblogger.org/93608499382.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_5ffa799229780.pdfIn PDF document text
    • https://ludekomu.weebly.com/uploads/1/3/4/5/134505051/kirogezoguwino_diwajazuko.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/sisetuxuromovurojini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459055/normal_60060f0e26b38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392474/normal_5ff476d77082c.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/rofebojolopom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bosotosevizava.rf.gd/level_57_brain_out_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/happy_birthday_song_status_for_whatsapp.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_off0000e3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D8 5536 bytes
SHA-256: 1e3a9c2a3993f5f10e2d36289c85225e624f4bd9105d598470d25d94b4b0ca57
font_01_sfnt_off0000f681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 10492 bytes
SHA-256: e545076ff816a21e95bd114169818dabacf3bc50b988bb934ff558431979e882

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