Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42ae83c359d546a…

MALICIOUS

PDF

46.4 KB Created: 2020-10-29 07:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7f34f3f6419572285f908f47ed488e1e SHA-1: 5f1c58a48b28e605d9efc0c1650aa7f9ad51ec54 SHA-256: f42ae83c359d546a9809043d10c59507b902b47553ecbc00b836cba8ed1445c1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the document's structure and embedded URLs suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=giants+in+minnesota In PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/zilijirarugepe_nutere_tavukutejoka.pdfIn PDF document text
    • https://forovaze.weebly.com/uploads/1/3/4/3/134315943/dasixisipixoxek-fetovazisax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f87ff67e55cc.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/6794538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f906a03383c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f8b6c95ba32a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_5f8f65ea89182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_5f8f5876c6de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5f8da52a727c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_5f9a30f0c6aef.pdfIn PDF document text
    • https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/gixizotepadorofakoma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7790/3551/files/jemavogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8650/1806/files/gargantua_si_pantagruel_cartea_a_treia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a862bc28-f123-4088-9500-4e93d1a671cc/ligasopovawubemuwojixage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2407/5936/files/19926393291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5f2441-b2f2-46f6-a030-63ad61f76b2f/bubazokejelararelum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5590b1-857d-4913-be92-a4ab8e542aa3/tizelinibudizajuviwot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c8cdd27-9221-4056-b51e-5c669765f435/80146707495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9823/3760/files/census_dcuo_blog_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5838/7354/files/frigidaire_gallery_french_door_refrigerator_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6531/9839/files/mindful_eating_worksheet.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_off00007860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7860 4732 bytes
SHA-256: 609ea31a2bb3309af354e5514e49d844635dfd6980a475bfd4a5b8ab2f5a1562
font_01_sfnt_off0000886b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886B 10564 bytes
SHA-256: d6dd66ac95b3976499431410b209950577ba2c42a5fc6e63864b091b68051d58

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