Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ce91752abb0a53…

MALICIOUS

PDF

76.6 KB Created: 2020-11-24 21:03:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31c00d93a61f965dbc4089240674ab58 SHA-1: dae6b87e0a44d6102b2318e6dfc36fb60319f64e SHA-256: 12ce91752abb0a5391171bf5e1d92887662bab528ce0aeab771e145385a5a2d8
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 0.9996

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://traffnew.ru/strik?utm_term=hungry+robot+wardenclyffe PDF link annotation
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/c41c42b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f8aa466c0ca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_5fa1ce9fd0837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5f9586f6a1aa1.pdfIn PDF document text
    • https://damilezudof.weebly.com/uploads/1/3/4/5/134599741/7167818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426676/normal_5fb7b62d73f12.pdfIn PDF document text
    • https://jumifusat.weebly.com/uploads/1/3/4/6/134629025/636f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f887404678fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f8d31815bd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f91f51480af4.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/najubu/brain_teasers_trivia_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/arcgis_10._2_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/journal_of_bioequivalence_bioavailability.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9A 5140 bytes
SHA-256: e1329cb65bcee9c0582aba8265ca4ed874bba0e85e5ccbcd12c5e76d2d5bbeb4
font_01_sfnt_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 11144 bytes
SHA-256: 69ae5a296b028b1e9522574240d8435c96fa01de1ea34f6eaa80bf671777b106
font_02_sfnt_off00010250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf
font_03_sfnt_off00011751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11751 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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