Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe782df348b1c4b…

MALICIOUS

PDF

80.8 KB Created: 2021-10-05 05:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 54a609ea836a4fa03c5d10ed4dc01f6b SHA-1: ea613bc86247c5ff543ff517d0b29cfc351ce05e SHA-256: abe782df348b1c4b1717e7b830c07587960d97ac5ea09b1991a90d4ade8d0566
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the link farm heuristic indicate a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://drafthe.ru/uplcv?utm_term=illinois+driver%27s+exam+study+guide PDF link annotation
    • https://hoangvan.vn/wp-content/uploads/files/86477142686.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/25194935605.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/kuwamodudo.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/63742597763.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/pafujodimifebaliboxud.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/51490076877.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/zuvoluzidofodakokal.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/9341373929.pdfIn PDF document text
    • https://sibconsulting.com/contents/files/47234042733.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/54725019373.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/23054d61bc31381fb50505984f959dcf/98220384417.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/83556699915.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/koremi.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/jimanekur.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/43805987081.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16135cc5badc48---99253919246.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/lumasevuxajito.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/34823331609.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/topobivivenogalegubekapi.pdfIn PDF document text
    • https://geniodelweb.com/file/80184064393.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/pusimi.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_off0000d49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49A 18568 bytes
SHA-256: bdd19108b2591c23ac62ac31ee152dd2e7becb07533c3cc348612e9b97fed78f
font_01_sfnt_off00010479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 10960 bytes
SHA-256: c096d384ee43cf2a01c6fdb82ee2b0ecb3659daf9c9f31884712efd5cb87cf2e

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