Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32b5343850f16e6…

MALICIOUS

PDF

70.2 KB Created: 2021-04-03 10:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1682a6dde00ab50f8b3abbe8bf235080 SHA-1: 981aac56f947ebd3e784b4109ff57bb2bd405e84 SHA-256: d32b5343850f16e6c4f8eae196371818a1cf173449abf390c43cc1701b920f10
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 ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a large number of embedded external links, a common technique for SEO spam or phishing lures. While no scripts were extracted, the presence of numerous URLs suggests an attempt to redirect the user to potentially malicious content.

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://kuzutuzo.ru/strik?utm_term=dell+s2415hb+review PDF link annotation
    • http://sozaxesugoj.mywebcommunity.org/aristoteles_gran_etica.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/1194296.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/dobukowivezovugisuzekoka.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/tizufebibifiwamejejuruxod.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/cch_ct_thnh_nh.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/advertising_campaign_example.pdfIn PDF document text
    • https://jonaduxito.weebly.com/uploads/1/3/1/3/131384171/vodugi.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/scary_stories_to_tell_in_the_dark_monsters_explained.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/redis_server_for_windows_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8fe34f-edd4-4ac8-90c0-2e30a73ac276/50840199674.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/45557459832.pdfIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_6337ef44dbbe4f9e93d5947bc765f81e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd96c30d-bbb1-4353-bd3a-9995204c2b7f/7-2_word_problem_practice_similar_polygons_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/colourpop_foundation_shade_guide.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/maze_runner_cast_dancing.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_a2999245bf6947709afa38388cb96c81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowokil/63283711884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/402f0222-5727-453e-b669-cb30c6b34ebb/how_to_reset_my_sanyo_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/what_questions_do_genetic_counselors_ask.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 4744 bytes
SHA-256: 847e201105cb68b88660fc4580cf7949391c0216a313bf3826c0e4fa647615cd
font_01_sfnt_off0000d7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DA 11740 bytes
SHA-256: da3bf1cbc6fad236e9450eaf595e78f24f105d83772865d6173a620b757c98ac
font_02_sfnt_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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