Malicious PDF — malware analysis report

Static analysis result for SHA-256 022769c1165ef367…

MALICIOUS

PDF

70.0 KB Created: 2020-12-22 07:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a82b20bbdaef02e7395a18406be712c4 SHA-1: 98b31f054e496443e9c76ba04b38e98bd0bd7f87 SHA-256: 022769c1165ef3672b4bd5a76d97239fc867bcdfa19b7786484fdaa432ac815b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are to other PDFs, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://traffnew.ru/strik?utm_term=under+seat+storage+box+chevy+silverado', is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://traffnew.ru/strik?utm_term=under+seat+storage+box+chevy+silverado PDF link annotation
    • https://tekipagitew.weebly.com/uploads/1/3/4/8/134871071/744a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484358/normal_5fd7dea2589d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5fae1e8ecd4db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470837/normal_5fd3ca372d71f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499329/normal_5fba7edca1ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421960/normal_5fb704320f5fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6b042b8467722f1fc230f/t/5fcbeba1bce7087d1aebd4d9/1607199650198/pikofefusu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52a818787e8798987a008/t/5fc80a3c234f70360a9cc715/1606945343821/heart_fm_top_40_chart.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc553ca11f6a41984a31074/t/5fc82552970db930d9b58415/1606952274223/age_of_history_asian_dynasties_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e925ea4a794d56451110/t/5fc3371ff81c9a2a0c0ab9ab/1606629152105/32754919446.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d659d49dd1244740d42e/t/5fca36b8196a600d3c3bf5c7/1607087800883/word_cookies_vanilla_beans_special_level.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11b4016f6d44b07c000b4/t/5fc3707c3c02f22b9d79178e/1606643842082/83742242166.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ba3b0a2757459be1f9cb/t/5fc13b0e6457125654688a2a/1606499087062/google_summer_camps_for_high_schoolers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e3c89ea50d41209e1b45/t/5fcba812393ce47356380206/1607182355227/lerevo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa749d104e5f152da6dd/1606220416900/68495447014.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_off0000d2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AB 5564 bytes
SHA-256: d17302f0ab1a5c546b7c70a37dd004a613a407d2b5241504876c5674f1b39699
font_01_sfnt_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 10916 bytes
SHA-256: fe739694d6c92588312b76a7da9fdb8ce24c80ef6631db2ecea5009867708af3

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