Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4d470852ce7c48…

MALICIOUS

PDF

92.8 KB Created: 2021-04-05 14:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6072424cf0e82bd73dd7c6909d7cb4e8 SHA-1: 519d7da17619d9bbe0e7a6a3a50b74a26a6f1778 SHA-256: fa4d470852ce7c48279cf0b5c38d80cee4241f478f195dfd60a7cd171cafad4a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. One prominent URL, 'https://kuzutuzo.ru/strik?utm_term=watch+hitchhikers+guide+to+the+galaxy+full+movie+online', appears to be a lure for potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/strik?utm_term=watch+hitchhikers+guide+to+the+galaxy+full+movie+online PDF link annotation
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/limoromifup_kimapolexizime_dobuse.pdfIn PDF document text
    • https://lokuzovitopoz.weebly.com/uploads/1/3/4/8/134871506/zezesonu_zufemi_lubupofe_vedemubegana.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/aurelio_mejia_libros.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/yo_whatsapp_app_apk_latest_version3t0kz.pdfIn PDF document text
    • https://nodemudikukurev.weebly.com/uploads/1/3/5/3/135348567/faxisadabos.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/ggWjccu/jiwewojufuvezirozova.pdfIn PDF document text
    • https://sonalopuxarore.weebly.com/uploads/1/3/4/3/134310538/rovibuja.pdfIn PDF document text
    • https://givurili.weebly.com/uploads/1/3/4/6/134605008/6523883.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/b155adbabcb.pdfIn PDF document text
    • https://runizupila.weebly.com/uploads/1/3/4/3/134320381/cda8f3.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/ggiez4l/pacman-_mirrors_not_found.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/what_sins_are_unforgivable_in_the_bible9i585.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_107317f508944540a8199ee800f4bbd1.pdf?index=trueIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_19498c6097a64ad3af64dd9867193e52.pdf?index=trueIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_ac396ff0ca6f40168fbbe2e8ee2d65f8.pdf?index=trueIn PDF document text
    • http://kugukokoner.myartsonline.com/carbon_and_alloy_steels.pdfIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_dbcbaae44b444d3e9a2e7450b2f71c93.pdf?index=trueIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_6607c6a78e0042fbb750d412d969b05f.pdf?index=trueIn 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_off00012cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDA 5744 bytes
SHA-256: eb83bf30d40419d8a103cf63e98c12cd879845a3b4d09cb8240dfc40222019b6
font_01_sfnt_off00014058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14058 10772 bytes
SHA-256: e432978a7659d01f9ef206dfcdf30f4c33dd5d735f7373e1e2171d18e45e09ba