Malicious PDF — malware analysis report

Static analysis result for SHA-256 6078cae4da5dff9f…

MALICIOUS

PDF

86.0 KB Created: 2021-07-15 16:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d9ec68ff3c79e63f7ebc2c54c8c8ab64 SHA-1: 4db93a3e3114a9061e529caf16ef39165854cc7e SHA-256: 6078cae4da5dff9ff692b80f243b57f04a72cf9eb77bf947be54480f630b8b54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://agatanorek.com/files/file/8556252838.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fd431943d---96046834529.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/juwovajogigutezazavajetid.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/resekaraxavetuzun.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/3372326544.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da5b3208974---tiwukijigako.pdfIn PDF document text
    • http://scpt.it/userfiles/files/sewadisiludupav.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/18184788082.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5383225c7---poweposikosadaverubik.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/54441023853.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/98162906722.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094674fa81b1---39517221065.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf58778ee6e---widabosakurane.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/4eeb323618f55b1e4b8f74ad1343bbef/vurifexojonubak.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/menodariwepo.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/82jmk7g0b2p9240adghp1pimtm/luvanagixavomejitewo.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/kavewifaxoxasodagin.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091bc33b5079---31168356.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/75679c5f468ef50be9c64c9a28e6e108/78901641387.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d241c04e08---rilofefezoradosazada.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/86325995262.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mtujntal4gac8l2mg0e2f3t69n/rebojumaver.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/vkl2d83eocvmrrachmhrmhf744/88853679389.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/69316271798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=story+on+honesty+is+the+best+policy+for+class+10PDF 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_off0000eeb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB2 11080 bytes
SHA-256: 6be9004ba18fb63e4d826b4ad56e3a43ed75792d1096b1d981432ffed3835f66
font_01_sfnt_off00010841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 16272 bytes
SHA-256: 6c84f6e12ec37218fd0e60568f50a4a3f11324e33f40350490a8b1c7727ba2a8
font_02_sfnt_off00013232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1