Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc98244f587cdf69…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 00:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c93aea454ab9f6fa8160b2191ca0a66d SHA-1: e3d1c82bdb311ca5b3dad62c90ee264be5e1aad2 SHA-256: fc98244f587cdf69dcf3019595caa1e06610abb7cc80f6912ce2725cc15d835c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggest a link farm designed to redirect users to malicious content. The file's structure and the presence of external URIs indicate it is likely used to distribute phishing lures or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=paratha+recipe+in+marathi+pdf PDF link annotation
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2a5221ca7634f4aaee09b6f3173f0eb1/28528624880.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c4fe8a969---3081044638.pdfIn PDF document text
    • http://amandamaitland.com/images/file/pozalosixajali.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/38996164206.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/62541372127.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c6ed47615---dipivazij.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/97095373824.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/noxinumotukotifirirepup.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/9225195548.pdfIn PDF document text
    • http://cold.lt/userfiles/file/xedelipuwapu.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/57499060261.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/52853492860.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/xodofit.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/82626250042.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021060909421566.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/livujuwem.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/f6d7f9fd6d74056ed3115e573b2521b4/fajijexavalilesemasi.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/78226580621.pdfIn PDF document text
    • https://clove7.com/userfiles/file/72094256196.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/94765248182.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c5277e16ccc3673bde0462c959ed1024/xesoxufi.pdfIn PDF document text
    • http://zatacorp.com/upload/files/vavetomofuvofafewuxavago.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607585e2d0d2c---binasotodonesinovifajiwil.pdfIn PDF document text
    • https://aneri12.eu/res/file/mowaxenaremizamesozas.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/ab849d0bb3ac30d7c6902829a999931d/vezurajifadedasuzi.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_off0000c3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC1 10552 bytes
SHA-256: 0735af4942798455af5804cae95b5f9394adb6fec1b476aee6729874e40a00a5
font_02_sfnt_off0000f392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 21340 bytes
SHA-256: 9f31eb328942d0a3c631b57b42c98e666fee73888b01d458bf65c96ca334a7d8

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