Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2e98a60b8270ac…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 08:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 347b6939613875b84d5fc30acba12697 SHA-1: 9f76036a17e903c4d14082358f9df7971bef8502 SHA-256: 7a2e98a60b8270ac4ae4b441ecec5642b8edc034143ce807c4f10fa4043214ae
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=bosch+800+plus+series+dishwasher PDF link annotation
    • https://cdn.sqhk.co/bamebuxi/iwtYrja/pivuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_604745a70d83d.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/ricl6zH/playstation_5_pre_order_gamestop.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/bxzejcM/zediroxabigexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476757/normal_60215006b43ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383170/normal_5fcc0136e23ee.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/Cq3jcQd/72980549418.pdfIn PDF document text
    • https://cdn.sqhk.co/lomuwomigez/Xhc8gjj/jelaxolapiwizedozufafupot.pdfIn PDF document text
    • https://cdn.sqhk.co/tizuvuwo/ihAnrfc/zejasefajazexawomopavevob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_601cda067f257.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/07nheo7/stack_jump_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_6030ff4d7060a.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/iqic4Eo/gufarurixifolanejuvofesi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366407/normal_6005ee77c260f.pdfIn PDF document text
    • https://cdn.sqhk.co/fosigigamef/4idNTao/22408230379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_6004c065e2cd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_600dec3b3c5df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50c84cdf-c8d4-407e-a307-361b94491100.filesusr.com/ugd/f2656e_d49fd083c63343a085c716e0af95aa9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/voposelasavoxeb.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_ce9b18730a034e0a94b96f44fbef4b7a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/life_of_antony_athanasius.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/regab.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/speakout_elementary_student_s_book_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/pezomilipi.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_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 5636 bytes
SHA-256: 8bb10d6c4ca5ca675db392d5c29782259ec17025a85fe3ba60467c030de2ecd3
font_01_sfnt_off000111d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D2 11736 bytes
SHA-256: b8a4dc84c4125a8483f18caa5e95941e53f8ab63ac1eaf4ff9ae4ccdc1c0b54c

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