Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9b5bda89ddeb95…

MALICIOUS

PDF

104.1 KB Created: 2021-03-18 03:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76ac5a6a7b33c1eb0ffb6740a9c68a87 SHA-1: 2865dac4903e53234c3a1be245eda27b3325fffa SHA-256: 7b9b5bda89ddeb952339aaf0d3a2cf4717e4b841bf844715a4a3da485a4c614b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm and a high ML score. The embedded URLs and the PDF structure suggest an attempt to redirect users to external, potentially malicious, sites. The document body, though heavily obfuscated, contains references that align with a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=ewg+guide+to+makeup
    • https://cdn.sqhk.co/suxupijisajo/ahja3SQ/world_cup_1986_final_game.pdf
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/zonixozavakivotos.pdf
    • https://vogoniboka.weebly.com/uploads/1/3/1/0/131070279/zafaganezumik.pdf
    • https://cdn.sqhk.co/pujapipiwat/cMjbgjg/amtrak_auto_train_sleeper_car_menu.pdf
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/mibato_jumalikitofu.pdf
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/zusozepagox-noxepenozopew-legejapu.pdf
    • https://cdn-cms.f-static.net/uploads/4503525/normal_6047e0f46be3d.pdf
    • https://cdn.sqhk.co/konarolikomu/ijOid3F/4112921469.pdf
    • https://cdn.sqhk.co/dilobowuz/jcN7gcV/kovuzevonajexu.pdf
    • https://cdn.sqhk.co/butofelo/FT2cuhh/realtor._com_rentals_apartment_home_rental_search_sites.pdf
    • https://cdn.sqhk.co/madufuxenuw/3japkGw/seven_7_minute_workout_app_review.pdf
    • https://cdn.sqhk.co/bijininabex/QiJggig/bemutujozedunilinana.pdf
    • https://cdn.sqhk.co/ketofebem/yicLojc/japajafem.pdf
    • https://cdn.sqhk.co/bofilewidil/HQUhfNx/14089888163.pdf
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5fd651b80792d.pdf
    • https://cdn.sqhk.co/modebopogut/ifbhejg/takutuwa.pdf
    • https://cdn.sqhk.co/xobanozizesa/APgcchh/1847750489.pdf
    • https://cdn.sqhk.co/lididiregi/yWjficL/28352809012.pdf
    • https://static.s123-cdn-static.com/uploads/4451551/normal_5ffc7f96cff69.pdf
    • https://cdn.sqhk.co/joxonorapa/dhfii09/siren_head_free_coloring_page.pdf
    • https://luvijitakum.weebly.com/uploads/1/3/4/6/134685142/zalilabew-webigalotezobo.pdf
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5fe6ffcc80899.pdf
    • https://cdn.sqhk.co/zimopaji/hgfABur/pics_word_game_level_48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbc7.bin
5d14970f574efe5b9246d1b71c29b716faff69fcad2f47b68915bbdc6f74ed80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 7368 bytes
font_01_sfnt_off00010ead.bin
c22352dc4502bd4ef8e70c53614b0febfe42e4c38e6a1d1b24de995c3f7cba1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 11696 bytes
font_02_sfnt_off00012e71.bin
47864bfceaccc2b7a9b4844e198965f982717748fe834a2990d411978a092bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E71 5084 bytes
font_03_sfnt_off00013fc4.bin
4af291ac6c378c6b2d793c4ead027a2e72d4d8c79d9226f528819b991ee21653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC4 2252 bytes
font_04_sfnt_off00014a05.bin
5ec58b68ebdcb91867eba27e1d4011049c5890005b733aa1cfb4d5bfee34534b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A05 15080 bytes
font_05_sfnt_off000179f5.bin
cac02cefb2078dd01c1acab5833899388f6f6b99bab3b03e4f2ab734de6a7b63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x179F5 16736 bytes

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