Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5ae6b9ead41b61…

MALICIOUS

PDF

108.2 KB Created: 2020-12-15 23:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 05397b7dc181edcf2d1ab14631c1f7d5 SHA-1: 972ca76250d2dcb3b9dadedf2ae91664d2f72042 SHA-256: 3b5ae6b9ead41b618a5c7fa34bb537e6041412718391bc6f75a22397497c038a
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=the+hobbit+goblin+king+voice PDF link annotation
    • https://kibejopabut.weebly.com/uploads/1/3/4/8/134884539/9685468.pdfIn PDF document text
    • https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/4955997.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/xepifawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f93db263e7aa.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/xaxuligixud-kesase.pdfIn PDF document text
    • https://bofakodejo.weebly.com/uploads/1/3/4/2/134265658/nezatuvipik.pdfIn PDF document text
    • https://kopezemab.weebly.com/uploads/1/3/4/3/134339977/nejetavovema_petekoz_farawafakiv.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://uploads.strikinglycdn.com/files/ff048337-9d26-4cf4-8954-a4442c1dbf23/sujevilaboxila.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/dazomebadokotepo.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/gefimuda.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/litasudobozusas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a5a8ec-5bb5-4590-b37a-adbb232b7ccd/shift_shop_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/rudorolodibimilux.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/99034567058.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A0 4576 bytes
SHA-256: c29ef298e9ec9c18d7f8fa4914f971ce633c21fac7673464bdc55f881c36ebfd
font_01_sfnt_off00017034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17034 11164 bytes
SHA-256: 058b8733a7564840213664d30bb4e5f22df584f1cab9e0e13cca46966f8d0aac
font_02_sfnt_off000195b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195B5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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