Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e466328051786d…

MALICIOUS

PDF

79.7 KB Created: 2021-03-19 11:06:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80420155ab49a9a5259a6128b95441fc SHA-1: 39b045dce60b86bb4eded2183952e2d42902be69 SHA-256: e7e466328051786d0035300ae5cde19ef1e21143cb88a22c86da840e4af579a7
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 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to drive traffic to malicious or phishing sites. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a likely distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/award?keyword=ankle+brachial+pressure+index+pdf
    • https://cdn.sqhk.co/puzukebejas/ajjitA5/purupekawawiwajimu.pdf
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/4622b999179.pdf
    • https://cdn.sqhk.co/fedelubu/iavghig/piano_ladybug_noir_tiles_apk.pdf
    • https://puguguduzi.weebly.com/uploads/1/3/0/7/130739618/231f47.pdf
    • https://vaputonusodi.weebly.com/uploads/1/3/4/4/134493057/b65d2f0.pdf
    • https://cdn.sqhk.co/kotolodegag/hJggdjc/mr_pumpkin_2_walls_of_kowloon.pdf
    • https://sowotelimavo.weebly.com/uploads/1/3/4/0/134000290/nemipagogeve-solewifijivati-gutatek-deneju.pdf
    • https://cdn.sqhk.co/tosilura/bIpULDj/who_is_the_imposter_red_reddington.pdf
    • https://fazugiwe.weebly.com/uploads/1/3/4/0/134012697/2281599.pdf
    • https://bibawegosisuzu.weebly.com/uploads/1/3/5/9/135961680/9262649.pdf
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/nojoxadu.pdf
    • https://cdn.sqhk.co/fejezolixo/2c5jeig/cheltenham_bold_condensed_font_free.pdf
    • https://cdn.sqhk.co/vigefifobot/bhfehdn/fishdom_save_the_fish_app.pdf
    • https://cdn.sqhk.co/gemesikexo/ihjdYji/kokuwamajixubuwa.pdf
    • http://wogizejelalod.iblogger.org/survival_knife_animation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c22ce45-54ea-4b4e-85c0-1ca06ad68d66/what_happened_to_yahoo_stock_symbol.pdf
    • https://uploads.strikinglycdn.com/files/27d763bc-a36d-411c-b8b5-d1bf2b5e3779/thomas_ligotti_the_frolic.pdf
    • http://zakefozufasedi.epizy.com/19466717838.pdf
    • https://uploads.strikinglycdn.com/files/1c43903f-f45c-4f3b-a06a-f460cecf040c/what_are_the_five_ethical_standards_in_business.pdf
    • https://uploads.strikinglycdn.com/files/2aa45385-5838-4213-a0f8-538dbb932d20/guterodegakivunofevomir.pdf
    • http://mibavened.rf.gd/trigonometry_solving_right_triangles_worksheet.pdf
    • http://pogebikaku.epizy.com/17407736310.pdf
    • https://uploads.strikinglycdn.com/files/f904e2ed-6cf4-4663-b171-d301f038d4b3/what_to_wear_to_an_old_navy_interview.pdf
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e5.bin
a34e078cc54fa0cdf5f992e11e473b2b1cf35256fccea462d8678983cf681649		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E5 5504 bytes
font_01_sfnt_off00010b99.bin
5012390f1335970f0a547fac9d544b745052581bc4e7a9eecff84ee20c9babb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 11260 bytes

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