Malicious PDF — malware analysis report

Static analysis result for SHA-256 7098785910a838af…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 17:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 65d39bfa110fe45640e48d2fb93d0397 SHA-1: bb4191cbe0d70f635e48c9d56b7cf4d28067627f SHA-256: 7098785910a838af0a3831abae5725d2d02e487313ae1a70792afbccce50d944
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. Heuristic analysis indicates it contains a link farm pointing to compromised WordPress upload storage and potentially disposable hosting, consistent with a phishing or financial fraud lure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of multiple external URIs and the 'Payment redirection / bank-detail change lure' heuristic suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=unable+to+connect+to+server+android PDF link annotation
    • http://shortguycentral.com/ck_uploads/files/mafupome.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/11976969737.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/85702564845.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613076df9f035---80599953097.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16133d86db8b6e---sevorulutotogiku.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/83962639563.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/31506493827.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613593aa70a31---72164820048.pdfPDF link annotation
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/zavizubedapol.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/sodud.pdfIn PDF document text
    • http://audiohrestomatiya.ru/content/file/20764044798.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/31108543250.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140308cf3537---bafuzirifizupepubalolileb.pdfIn PDF document text
    • http://tonghuichem.com/upload/files/60328872294.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16130b128f1c32---wepilapimi.pdfIn PDF document text
    • http://boldogelet.hu/media/54864257452.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/zaniv.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/nutuzowijijasumo.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/manegupulawoni.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/walokeropalikegar.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/wopejisesodoxotivixogetal.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/sikopuraxozugoxiwatu.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/pamusuzanamipulowumol.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/31f4e736246fa93e15e7ee3cbe7d5a4d/92455207803.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/6740810842.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/54794834327.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_off0000d9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 17508 bytes
SHA-256: 20324a4bd33169f646949ee95a5d5722a561f29b23a117f486c86a80d69ef011
font_02_sfnt_off00011f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6C 10576 bytes
SHA-256: 2d41f92e72954b0c4444c1b378437a9b5b62f9296d5a386fb27c3a7d289e476d