Malicious PDF — malware analysis report

Static analysis result for SHA-256 096470303ed94f56…

MALICIOUS

PDF

81.8 KB Created: 2021-05-06 04:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 36d5a40aac8d49e9e1d86812afde210b SHA-1: 2621608bc86a2055abd4aaa80bfaf7f72282cf06 SHA-256: 096470303ed94f56d4f71d11d2128e55a89e84859f1231a5b0360674ae2eaacc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm heuristic point towards the potential for JavaScript execution or redirection to malicious sites.

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://fokemale.ru/strik?utm_term=first+things+first+l%25C3%25A0+g%25C3%25AC PDF link annotation
    • https://cdn.sqhk.co/vipujitebiki/jMBNcgh/kamafedejexa.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/jcKKhfP/confused_cat_meme_hd_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/BXgjaxD/fighting_spiders_singapore_show.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/cbhjMjd/photo_ringtone_mp3_download_2019_pagalworld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_606099717aff3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_603aaa5903e09.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/CbT1ghp/everfi_module_5_credit_scores_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478687/normal_5ff56e491d41e.pdfIn PDF document text
    • https://cdn.sqhk.co/ludukuni/UKZZHPv/compile_c_mac_os_x_terminal.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/bOgi2ji/messages_app_icon_aesthetic_pink.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_5fd3cb2d3df7a.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/jjJ6Ohj/ralisezilivuxubovogujinav.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/h4yOcWC/callaloo_soup_with_shrimp_recipe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_533e49b03c314711bc37f4196297ac3f.pdf?index=trueIn PDF document text
    • https://2b01876c-5741-4e94-bfb6-30973e4a6517.filesusr.com/ugd/45d688_0c5053b066a64d189379f4f46e566b0a.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_ac2cbc6c927641e3a8dd8eaa7d8fc735.pdf?index=trueIn PDF document text
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_84f618f531e64dcb8061f79a1b5ab0ee.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_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 5064 bytes
SHA-256: 44b05a5703e96b1f52def3b11190eb761f6a93e788ec4a70d671d7bc3cadd739
font_01_sfnt_off0001039c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 23864 bytes
SHA-256: 4b31eaa79278ee5630b2bd3e9774733c46810ef5701df3f61459342548d3ee3a

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