Malicious PDF — malware analysis report

Static analysis result for SHA-256 5748bb9596433982…

MALICIOUS

PDF

70.7 KB Created: 2021-09-01 00:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 86655478099d56025f88c9e7f543ec47 SHA-1: 4d692e4459504080eec209f5d4e4b49a63e42c6e SHA-256: 5748bb9596433982d046148e956d858768a555a7f47609d2ecf9ae2eea3beb4e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates it's an image-based document designed to trick users into clicking through to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 70 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://pixomot.ru/uplcv?utm_term=georgetown+funeral+home PDF link annotation
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e81204e880c---vorebuje.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25ea8940e06832650512b82239ae1374/5267545640.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/pilegiketelanazefawupeko.pdfIn PDF document text
    • http://landpas.pl/upload/file/lutejivoluzaboxe.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160fccd1c5fc5f---mirekudaxifuzitapil.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2229b7bb9---88007677951.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/306876204f66ab493e35db585a855b41/64744527293.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/d0c2061c38263d7c2b4eef0ed4de6c8a/jopitedilapuxadesopow.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/demufija.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/88206525713.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/puxowovubalujapafubaxo.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a77698ad5---vakorerawul.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/danuridoroto.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/29364621474.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/jaxetikozoxelakopij.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/39724141959.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160978049eb334---79501063295.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/20465298066.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070d17c84b5f---pegalur.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xalapi.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/n2op60v57b48t1vj0kgqnq5mvq/lifunotajabolikazupi.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/xogujezaset.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/80585429246.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9d34f19dc---madagari.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_off0000b858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB858 10628 bytes
SHA-256: 08e7f14127295f6be20706bfb3f21e7adc7d74e6869b2a45b67f34b6167b69cc
font_01_sfnt_off0000d096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A8 13936 bytes
SHA-256: ab2768bcd28cbefeff8b6b23aae43e214027148e9bee56a3d594a99046af9bdf