Malicious PDF — malware analysis report

Static analysis result for SHA-256 d409e45da0fbc277…

MALICIOUS

PDF

90.2 KB Created: 2021-09-27 11:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 57c6b76038bd2ff2773ba629a1fb71e4 SHA-1: 027582966c745c724ef229c38704f392583b03f4 SHA-256: d409e45da0fbc277fe504c31aebb980f9fe50fa33250a0b4ea1b92f7519cf561
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to external sites, suggesting it functions as a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a tactic to distribute links across disposable hosting, reinforcing the phishing or malware distribution hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://evabizz.com/userfiles/file/75814075183.pdf In PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/44806764983.pdfIn PDF document text
    • http://cl-pub.com/files/files/gajejofololobusisupovu.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/73970427825.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/14221290838.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/9797190987.pdfIn PDF document text
    • http://xsteelstock.com/d/files/xunikififamuridogekejezu.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/f5a8f3a7f9faae758398ab4f2a97e072/kuwede.pdfIn PDF document text
    • http://orem.mn/uploads/files/43006438471.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/1422720556.pdfIn PDF document text
    • https://thegmsbihta.in/userfiles/file/nasobojijodejepigugile.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/61911675140.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/nijutabatakawikizedipu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16147ee9e56745---gonabeparowemol.pdfIn PDF document text
    • https://loctra.net/userfiles/file/nowizizuzajipokosutipivi.pdfIn PDF document text
    • http://topflexsports.com/uploads/govowuzufukapoz.pdfIn PDF document text
    • http://chieucoingason.vn/files/29521930502.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/lijudotozuxasu.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/98940722248.pdfIn PDF document text
    • https://highrise.pl/file/25987295493.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/56395358409.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/vixizenajusil.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/pikaditinefa.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/ravuroxutadazazaxu.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/ruvosimosubebixapejuwineg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=cara+mengaktifkan+paket+data+xl+di+androidPDF link annotation
    • 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_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 16672 bytes
SHA-256: 35caf59da73ac688a4dfd03569df2c6517eedad06ad34d645ffa7d56247b472c
font_01_sfnt_off000129db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DB 10900 bytes
SHA-256: ea5dfabf304eb535886fc7185db4699228070be769e6d5e4ad19d82a36702ba5
font_02_sfnt_off000142dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1