Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fbef5e74147f7e…

MALICIOUS

PDF

209.3 KB Created: 2021-08-15 22:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6fe38c5ce0a6a0619980a0e273094627 SHA-1: 43f9361f1494a6384689ad01cdf14d93f86d9bae SHA-256: 82fbef5e74147f7e03a4e79a1846d3ff6a63f49e5f7cb357c9bbc469f53dd6c8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of these links indicates an attempt to redirect users to malicious content, likely for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9749

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
  • 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.
  • 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://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2d6c2c5e8---widubexinejujovuwinikam.pdf In PDF document text
    • http://eko-inwest.eu/upload/file/98857956793.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1dcc30bc60---xowog.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/pixegajiluxade.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16116c0213103c---pamuputabaxekezizik.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a3f401e51138ac76003b29ae7453eabf/17882954743.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/pokawive.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdae24eb2c---84136253621.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ca783fd25---64660553161.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/3603e10306c7f3996d331ee881f63eb7/56993686198.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f276326e43e---14933565821.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/247b8a96edf78eccd63162c8a1a4722b/67085777495.pdfIn PDF document text
    • http://gilleyfamilyreunion.com/clients/6/6c/6ce887ac6ce8bbcacf46524318b1f362/File/kowasemedeturakijototiza.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/ladewefugi.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/95920809070.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fea1e3bf---64963264293.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/20650784915.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4ed47eeda---gorezumi.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160fada7856f95---4228242167.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/tuzavukatebuvo.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/si0sb80afsgr133q6bh8jlcsj6/ramavu.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16085a142de766---vaseguxuxugid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=what+does+the+bible+say+about+fasting+in+secretPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ab45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB45 16648 bytes
SHA-256: a9710c150e7cc2862c18d3bb1b0278902861784964cb13ecbcef47bd4efb879b
font_01_sfnt_off0002c2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002dae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAE7 30500 bytes
SHA-256: 18f41c8fd7ab6bade14eb3398416cb243e788dbcf7ad4ef78fe02b1dedb89d53
font_03_sfnt_off00031c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C49 11104 bytes
SHA-256: 7519ecbe26c291ce1326d0001b2874bc346fefd8066df5d983d5d34121b68e4a

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