Malicious PDF — malware analysis report

Static analysis result for SHA-256 f996f8d7daac18fd…

MALICIOUS

PDF

74.9 KB Created: 2021-07-18 14:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d1974dd6db909b608fac24fe963aa467 SHA-1: 0cf1a33b77da032c5ff507e3dafaacc05fa83050 SHA-256: f996f8d7daac18fd238941d29411eece276b7f55e54d214dc8048467e59ad159
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a callback phishing lure, prompting users to call a number for support or to resolve a fraudulent charge. The document contains numerous links to external PDFs hosted on various websites, many of which appear to be compromised or disposable hosting, suggesting an attempt to obscure the ultimate destination or to distribute payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f211bd5d87---fazagajilu.pdf In PDF document text
    • http://vgkbuilders.com/assets/files/86362225318.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/juteberusosaz.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/b4c5824aa891d8f76d673af02a638960/kepusijolejijixezegi.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608912b8b5b6e---dimuzubewikaj.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/qb6sfm6p5v57hkh70toa28anjd/19487805035.pdfIn PDF document text
    • https://kawanmto.net/contents//files/nuporogalidumi.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/fevuv.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/gadidow.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/99126331944.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/oj857r593rhbcv2hadjecnb3ms/16918608594.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/mobukaxejegoriti.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/91850946465.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/12389571265.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d8e22db61---55146601096.pdfIn PDF document text
    • http://waypl.pl/upload/File/8939354337.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bp1e355dkq9e51qfl7e48n0gf7/84392806659.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1ba58d60d---7832118393.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/19309373893.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607b080b0cd6c---rukizazakuxevil.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aacf0640e20---pifepaxi.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/lulovesifemuvatasi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=first+federal+bank+lincolntonPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21A 16796 bytes
SHA-256: 92b816f4b1fe6e49f1fdddcfc40968cc6c7fad3b5cfda1bc2fc66e2a59846f10
font_01_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 10676 bytes
SHA-256: 2dee84e84d16921d1afc8b097d0f4b7cd33d075e0330c0c234997167987819ed
font_02_sfnt_off00010697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.