Malicious PDF — malware analysis report

Static analysis result for SHA-256 179513807fa89de7…

MALICIOUS

PDF

91.7 KB Created: 2021-07-03 19:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9d18ae57e35a66cdcec8b0ba7f5465da SHA-1: 29e904c67b2948e0105f351ee7b4334267f369b0 SHA-256: 179513807fa89de74e4448500ea6e8c5e3422a87e94cc582f05bb4702ab20808
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed 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 phishing and tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=how+to+gift+someone+robux PDF link annotation
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/859fa634ecee5cd53c0efa212a3b616f/funigewuz.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1ccc420a9---51042981748.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/sr7ha4mect2594rak0m3dpv7cq/2357830560.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7f6bcb722a5838859d108df90137db0c/30091808499.pdfIn PDF document text
    • http://garderoba.sk/images/_file/50282419978.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/84458034292.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fba4b936c93f51289b33a8cbda29bfdc/26157675231.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852e72e8ab8---42658741472.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/97398163027.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d2166b39e---15440835394.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/kujozavegosozarane.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776d07517da---98064600961.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dddac250e---binebokaxazajewubegudix.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093280adaa91---82890032722.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210602221127.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/bunefakewexosato.pdfIn PDF document text
    • https://marigabung.com/contents//files/tafevupunin.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/xibodadalokuxuxifowosof.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/95457406643.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/05ccbeffdcdd419f9cd62e7bc2e4b273/78657149855.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df712afb5e---29970072346.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/543e4aa986f1e68220f863628f5d7880/38159786859.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/mhemh3qf58pbo3moarh6l3ktdd/83695036683.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/21b68c1daea61d685a30534002066df8/kebemeratexukawikite.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_off0001026e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026E 17544 bytes
SHA-256: e92c2405c9b9dcff62ffd7964827d905d4d38b1138243e3a183af3a53f3d1614
font_01_sfnt_off00013015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13015 10768 bytes
SHA-256: 4eb601f38e78f9647bf10e0ac3af721bf3a3f3b3f2575af2e21fb74a30c67d13
font_02_sfnt_off000148eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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