Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d80433e932053e…

MALICIOUS

PDF

80.9 KB Created: 2021-09-20 17:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c22336e844cdaf0e1d10497157897f9a SHA-1: 5af36c0f912f79a2073129dcd75968326c2793be SHA-256: d2d80433e932053eb08a99735e543c8a30becc369c821fe8178018d3f37e2090
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggests an attempt to redirect users to malicious sites or download further payloads. The 'SE_CALLBACK_LURE' heuristic indicates the document likely contains content designed to trick users into calling a fraudulent support number, a common tactic in phishing and scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=how+to+screen+share+android+to+laptop PDF link annotation
    • http://hatowo.com/app/webroot/uploads/files/roxumavonigepudila.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613e537b4831e---visakafezi.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/56402368061.pdfIn PDF document text
    • http://alptw.com/images/files/96076651839.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/98461049823.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/72478303912.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/laxovekirujopisomidi.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c47cb51958---15328516577.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/97387290617.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/79974274897.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/gotawokopiviwixapibogi.pdfIn PDF document text
    • https://ratosatu.com/contents/files/71378000873.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/75962941765.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8ce1ed9e1---68724824679.pdfIn PDF document text
    • https://cian.hr/userfiles/file/rofuledixorokirasor.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d60411ad53---kariwubivanul.pdfIn PDF document text
    • http://rs-entp.com/upload/file/47593592868.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/6fea526e09083cb5f83bca1f76a0b652/vamevevifodigubetu.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ad5853b85---wikadidilus.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/tazuridebupitenipufaz.pdfIn PDF document text
    • http://mweb.cz/images/file/3900306759.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/bakosalabetegasutewivozi.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_off0000d6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB3 17948 bytes
SHA-256: c54d1e8260afbcd73a8180417bccf778e19c90236d5ebca8b6e20bb147970ec9
font_02_sfnt_off00011d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D64 10688 bytes
SHA-256: d7e80d3bebc57cf5293fcc2cd080583f63394b08b979faa20b95011404288d5b

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