Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9e030d15d48a39…

MALICIOUS

PDF

92.8 KB Created: 2021-09-07 21:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 82759f93e7e45bd00f631d985bcd7df7 SHA-1: f59b94e28d00c85e71bd0d2582237c2d29320670 SHA-256: db9e030d15d48a39bcc5e91373fa1fbd54d11b4245248cfc8e965aa01dfe0c12
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or callback phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=sony+headphones+mdr-xb950n1+manual PDF link annotation
    • http://artospace.com/pics/file/95138578568.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/rudigi.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ba274caedc78dfbf57c3fe74a716b86e/52902022253.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160efdcf0161eb---mimoduwurolitititamog.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202108241842294574.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/90291987910.pdfIn PDF document text
    • http://c-six.it/userfiles/files/87684955520.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f68262f23---88826034775.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4547b34abe---20793086145.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/a0c2e4bba7ddd482d97e8aba478c9388/71940631290.pdfIn PDF document text
    • https://btegypt.comfile/73049001346.pdfIn PDF document text
    • https://www.neosynapses.com/wp-content/plugins/super-forms/uploads/php/files/6cuuj30nbr5324rplg6g3c6pct/vepobotigi.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/601f1675b2649d51f97b0cc038d04d3f/topuzesagafizojiduf.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/foxowudozidebaj.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/rupofafebigixitidokulow.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/fikozarubidu.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/molake.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/galufisi.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/senoxifunobasevudopanapi.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/34931069360.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/cnkisvsjqc25h8b2njjtenbvld/pirivibu.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/nororozijijusefofimupexev.pdfIn PDF document text
    • http://farmina.ru/uploads/files/916397909.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_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 11508 bytes
SHA-256: fd1e1fc8d9863176333df6688df15056752b45594b3b8e53c7c44f333e196ce6
font_01_sfnt_off00011d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A1 18576 bytes
SHA-256: dbd429049b60be3ccacd5ff114ea38b1f22650a2a83a0a8d38b4fccef4237972

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