Malicious PDF — malware analysis report

Static analysis result for SHA-256 159106a6fdf69b97…

MALICIOUS

PDF

80.3 KB Created: 2021-09-13 14:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 486ec608079d50d14620f8b4a5de0101 SHA-1: 2444393c938fc32c1ba63a5b5ccba2970536174e SHA-256: 159106a6fdf69b97b65e4a2d944aff79fd468838d5f09136615f573def1f1182
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs that point to a link farm, suggesting a phishing or malware distribution campaign. The presence of external URIs and the link farm heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=gerund+as+subject+worksheet+pdf PDF link annotation
    • http://m-camper.ru/ckfinder/userfiles/files/89980434510.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/tesitofetovolapu.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/pomipodaxoramotoba.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/butiwotifizi.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/76687707285.pdfIn PDF document text
    • http://duef.ru/public/file/94256623171.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24770770754.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/5795322833.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/43494941100.pdfIn PDF document text
    • http://xn----0tbbbfo0f.xn--p1ai/userfiles/file/97104225149.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/xizobumizovagepos.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/29825801561.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/gafurefufaselanisezovimeg.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/nixazi.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/74549998934.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/sizosipazuxabufatujowitub.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/liwejesite.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/durodidaruzusiwo.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-3/20210903145207392620.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/jumune.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/viwimabosevipizera.pdfIn PDF document text
    • https://jagominum.com/contents/files/6872164129.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD363 17876 bytes
SHA-256: 77e4898c861a54f8836c276c3109941daffcb213c9b04f40c166b59154e3b115
font_01_sfnt_off0001014e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11965 11168 bytes
SHA-256: e65a4f0a2575e67e686750348cf7c6838027833c4b49737ef6829808391d9575

Open this report in the interactive analyzer, or submit your own file for analysis.