Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6cac26ad0e6ac45…

MALICIOUS

PDF

73.2 KB Created: 2021-09-03 20:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 80b9c8255296ccf882b9b07c2238a279 SHA-1: 92845e8fedd767297a489edcc817faea8573ec4a SHA-256: d6cac26ad0e6ac4505ad56f5d248da6be3e8d79f56b46e8597dc9d066c6eb26e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an intent to redirect users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=fisher+and+paykel+fridge+model+e522b+manual PDF link annotation
    • http://agiusfuneraldirectors.com/files/file/90948209468.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e825a0d0425---54673468734.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/feb26613090536c73a047b8ceff5bc83/37238626439.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/zodejulip.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/fidalofogesumada.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/27867133071.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/nukepuwopixakokajemezutur.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/bf7cb92aa6b1f5111f5da18c72916237/kugewarijugejus.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/eed43ed7f109f8aa1ae37389a7be32fd/21190690548.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210616143809.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/91180505629.pdfIn PDF document text
    • http://proxima-design.cz/files/file/86966071508.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/85219996603.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/medumesoximudu.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/abb43dce3f35abaef075d8e6cedb4fbf/lagokaduv.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1844457b0e282ded88bff5cae5bdd9f7/nipepemewunejufagupikox.pdfIn PDF document text
    • https://securitydm.com/slicice/file/zenemajaberusakisiwaj.pdfIn PDF document text
    • http://landpas.pl/upload/file/66225248913.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/64012686440.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/zikorupupimex.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/xemofo.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/iphddf5vghht39cj6l3aqdfpqe/jowiwufuvurejuda.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/dakebenumori.pdfIn PDF document text
    • http://salinasouth.com/clients/11073/File/11197287403.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_off0000b78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB78F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 11524 bytes
SHA-256: 5ccb9f5ee0a4141809ec57e342a48eddde8fa368b66fa13ea64949a48f345b31
font_02_sfnt_off0000ea5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5F 17392 bytes
SHA-256: a0dd31ea4113571383a0baa9193db8de62cb272cd2fcfa849e016c140df0fa28

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