Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab0bd95a787c818…

MALICIOUS

PDF

70.9 KB Created: 2021-09-28 02:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4ba66eb09246f1fc47037331a8b28750 SHA-1: a1b543379ecd7c5e096a946c028a164fdd38c295 SHA-256: eab0bd95a787c818ecc34307228d4e09dab32eb1e0a7453048ed1e669433589c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://groupementpecheduloir.com/ckfinder/userfiles/files/datikodilesawa.pdf In PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/tizisagezoxop.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/236ec3e8116e0987dfb4ece2a18679a3/50063762581.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/28972597548.pdfIn PDF document text
    • http://jawarakreasi.com/file/nodokovakugegupuvoxuwo.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/mesatipojebawid.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/92996693281.pdfIn PDF document text
    • http://fitviewer.de/files/file/vununosusoxunodudogu.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/nolupoxolugaxabifuvabog.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/ruselexo.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/5f1ba78627d5362e6b09d4f83ef0ba7e/55387690129.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/mefaku.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/jozirarogezawusis.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/gikawede.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/loranul.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614037cfd1512---59691180378.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/90794930090.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd9e9ad012---57747677724.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/bd67e8ecbcd2cd0318a75f068c68f09c/xamenot.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/55711109149.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/xadijirawujakogot.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/sujuz.pdfIn PDF document text
    • https://ijpdua.com/contents/files/fikesupafilotekebexawij.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/5567461512.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=google+locations+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_off0000b3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3ED 16396 bytes
SHA-256: 619ff2595c400992397dbf599f2c9ff232ea3886499b377246959a1850c77e94
font_01_sfnt_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 10584 bytes
SHA-256: dd1ac826b71e0331b9f56dee7fef7cdbedf7c00481ea70a9a97212d02ac2f75a
font_02_sfnt_off0000f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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