Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54efba5fe25294b…

MALICIOUS

PDF

81.0 KB Created: 2021-06-09 01:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e87c7e28eb83d1671ca9e76fbc175182 SHA-1: b90e84bde86f0714d6fc01deaa59775d63a0ea8b SHA-256: b54efba5fe25294b98f639dc20dd9674656247421f3baeae3abe205020408154
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to 'Berliner platz 3 pdf'. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://crysiq.ru/uplcv?utm_term=berliner+platz+3+pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/467d4a3a560687094172ca20470b0b68/bexafatejukeda.pdf
    • https://daxitrip.com/basefile/daxitripcom/files/bamomegowukazopebuwaweke.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc9bf52585---61579498592.pdf
    • https://avonsteel.com/UserFiles/file/88899598238.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/fd519a67b55f5e1ce73f6417ded04e0a/rivapanebedil.pdf
    • https://marljivo.hr/UserFiles/files/nesarinugexo.pdf
    • http://tafgambiatours.com/userfiles/file/sonaguva.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/761f5df0b744c603f0f7deba5dbc5944/64999265527.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160832a0f62f1b---91810949719.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/db5fiv2cnll2o4gcodocqg9rmp/68868413755.pdf
    • http://amandamaitland.com/images/file/wazulodojuwi.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69f60ce95e---1492869195.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6299f1c81---69390748224.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/d9293edf14dbur5lb9kt1ch2mp/81811316319.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0a27eb8ae---42915779062.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/92763197575cb524c42dcfee8253d49e/bajebukupuliwokisij.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/b3faf3fd7efd792c7cbf50af2d4267d1/vumozoxudinuwolonoxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff28.bin
fc2c402ad261d5e0a9ccd98e0305c597dc24d140e298aeb25c4e43bdf4588a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF28 5120 bytes
font_01_sfnt_off000110b0.bin
b27bec54ec0e3e88c51cc4d39af5ec7b83d43e3db54bebb0ca4c7e74cdd15dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110B0 11600 bytes

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