Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98fea1d52e19846…

MALICIOUS

PDF

90.2 KB Created: 2021-09-06 05:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d47ff8f9fa60760caa40eac86257a00a SHA-1: a80fb281b9b900f84474a60c363de4706c04b39c SHA-256: d98fea1d52e19846fa37a738052270970ac4d0dec4240a9650f7cd509a1c5399
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://pistant.ru/uplcv?utm_term=thelemic+qabalah+volume+2+pdf PDF link annotation
    • https://santchavarabed.in/ckfinder/userfiles/files/44469112278.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607190a2c626a---kudadufotap.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/6le39rq8uf6hr44hc3r52kfi32/61167860138.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/60640318254.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b998267d89---36457474331.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/jn6mpd78m1knr0p1ma2l5gha35/49563911570.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f96c97086ca---fejunitupumirobapanim.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8ad85f157---kupejerijagevujuvesoro.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134af2e2e0e5---49042074289.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/12187933705.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/diduxinofuxosof.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607976fdbb680---voxazivibagel.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/ridefaxufajanejomap.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/54624459799.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/62355432734.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608780391cd92---lumowixeritaxaxoru.pdfIn PDF document text
    • http://nature-revive.org/files/file/26130983041.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/1943947c8241e056aafa3bbb4a166570/pevemaxinuloxamone.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/biregili.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3cd2399c01099818e4f9363bc94b2a1e/6578767404.pdfIn PDF document text
    • http://sro52.ru/uploads/files/nesokififuxolafopudo.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/28835542170.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_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 17860 bytes
SHA-256: 1f6bcbc436099bcb89ebd09520ea2fb8c4447fc8c1ddcdb0801cab85827ef504
font_01_sfnt_off000128c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000140dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140DC 10948 bytes
SHA-256: 04a0a2f93c327e24b7f2bbe6df23c1f785447665a9e1a2dc0bff522515a3ccb2

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