Malicious PDF — malware analysis report

Static analysis result for SHA-256 876a6d7d712a83f3…

MALICIOUS

PDF

78.2 KB Created: 2021-04-06 14:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 72a52f746e40d7d9d4612d8582d941cd SHA-1: d5bd889cefada6508c81825ce7da0e69a8af2155 SHA-256: 876a6d7d712a83f31f0625c6e8f68c7a2a896f70e295090710aba900f95a1af3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple unknown reputation URLs strongly suggest malicious intent. The ML classifier and ClamAV detection further confirm this, indicating the file is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/123?utm_term=angry+birds+transformers+mod+apk+hile+indir PDF link annotation
    • https://cdn.sqhk.co/pilozarager/JHjeidV/go_viral_meaning_dictionary.pdfIn PDF document text
    • http://www19216801.site/berserk_volume_38_cbrwbau4.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/bghhc69/39566644304.pdfIn PDF document text
    • http://mexicotop.xyz/47927971500da8b0.pdfIn PDF document text
    • http://mstmail.space/danadubapirolakijx58id.pdfIn PDF document text
    • http://true-board1.club/bosch_nexxt_500_washer_error_e04wz73b.pdfIn PDF document text
    • http://goproonly.com/junazoxawivabadelibavagf9ksi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/asopalav_tree_information_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/does_casio_ctk_2550_have_weighted_keys.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/46371120077.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/launceston_college_course_guide.pdfIn PDF document text
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_aea41748c62c42149184c2eb4261f20e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/13112977827.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/hey_you_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/givipemageweniwivukin.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_fac66f94b8c6469e9a902a2c1e130e38.pdf?index=trueIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_6e568b3af59c4bfa8e9596d09673b152.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/how_to_change_ink_officejet_pro_8600.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/nikon_d40_timer_instructions.pdfIn PDF document text
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_ba2a276b5e52481e9153fb737a980e16.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regovadeje/83303470823.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_4fc2faeea78e4abaa59bd0728119cb21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/62355097278.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_off0000eef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF3 5748 bytes
SHA-256: 9b06027f17b1554ef0f0c2632f6e9601a88fa79e9b6270c5b5e8ad212d8a7d96
font_01_sfnt_off0001026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 12008 bytes
SHA-256: 7dec5ca8a430fbdecd1285f06d902bd9505c7446a9a8fe0507679ce8dbd8a278

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