Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da5a0da9008c5ba…

MALICIOUS

PDF

68.5 KB Created: 2021-09-01 11:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10868aa59e1c2152a2387101a9b80caa SHA-1: 68494ab1807b3d3ceee797ef125fb9491c0a24bd SHA-256: 0da5a0da9008c5ba79494184b9abed999021a71cd0b9b5a3d26d89871c3e5060
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links pointing to potentially compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and appears to be a screenshot lure, typical for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://seerupit.dk/assens/file/lanosigalumulanozave.pdf
    • https://majubesar.com/contents//files/3561755423.pdf
    • http://lnianemarzenie.pl/userfiles/file/41982414216.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8a7f95d0b---kebusurasi.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/f1pu6e9o3oj8rbvgkdln8qdubr/lovekebapusiwo.pdf
    • http://vizesblokk.hu/files/file/mumujalodekebetudadaki.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe4284cc87---51912804136.pdf
    • https://lacausedeslivres.com/userfiles/file/15828520461.pdf
    • http://sllight.ru/design/img/upload/file/75807857077.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d714b8342---fisatoxamalawe.pdf
    • http://tianfonmm.com/d/files/xepipu.pdf
    • http://kaies.net/upfiles/file/48050057382.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/busexa.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160775be6e2d06---99660781912.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d229ffe7251---19962653263.pdf
    • http://ch-bovi.com/upload/files/lepotipikotilogipikifa.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbf2dc94c3---pajidenurane.pdf
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/79649020983.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/b278afcddb917b2c3430d7dbe2a45619/72490237619.pdf
    • http://al-bandak.com/userfiles/file/31334578279.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160808b7e016e5---tezaratixu.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/0cbek1ktglb9913l4vq78piet7/82752136856.pdf
    • https://ebdaatcoop.com/userfiles/files/kuvomufafekapurigivi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=clinical+manifestations+of+hyponatremia
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b09e.bin
ee15d8365fdd349243b4752b10cff3bd7eb9e1b388e8bdde8da09821b38e12e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB09E 14128 bytes
font_01_sfnt_off0000d38b.bin
1f363c444ee0ff88319ae30393e34deb04a3e006a8043ae67049756a533145db
pdf-font-stream PDF embedded font (sfnt) at offset 0xD38B 10892 bytes
font_02_sfnt_off0000ec96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 16792 bytes