Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9272fec000fd98…

MALICIOUS

PDF

91.7 KB Created: 2021-07-17 15:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0139522ef3d281cafb87da624c8a090e SHA-1: 26509b31f611a57425fdcc93fdcd871a2346a165 SHA-256: ee9272fec000fd989f27ef2b100c8b92a0df0b7f027e2fff8fd73e3e545b3235
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. While no scripts were directly extracted, the nature of the link farm suggests an intent to redirect users to malicious content or phishing pages, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 6

  • 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.
  • 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://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h1imlnk967uaj6ncfcf81t49fo/degotikiwelib.pdf In PDF document text
    • http://uptownherndon.com/uploads/files/46551367773.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/17703997783.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/26643860779.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160845d22d8126---32912214971.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc53203201---49636321595.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/32216418615.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/42094565383.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/97671752299.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a3a2c3b73b49fbdcb350d7eaf26e3501/sosifemoruxur.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/99040175501.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/42237528098.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160941ebb7d927---18524059592.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/4790788789.pdfIn PDF document text
    • https://nada70.org/userfiles/file/wevogarejeninawud.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/wusuli.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072afa1a2db2---xoxedariberedimatekegewux.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8977fe586b---tojivokuwo.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/zixito.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cd8ab75ce---kevov.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86de0ef005---28901545732.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/95503618863.pdfIn PDF document text
    • https://reniuved.it/file/35597161208.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc346eb04d---37065532601.pdfIn PDF document text
    • https://elektrona.cz/files/file/69666814455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=tujhe+kitna+chahne+lage+hum+audio+songPDF 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 16276 bytes
SHA-256: ef858b01719cec29ba59f81a977f79613a1aab7fbc1f32c2ef09c5dd0d876d7f
font_01_sfnt_off0000f767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF767 1696 bytes
SHA-256: 0a4f45ca35490f1796084ea6d97ca1a4a36387197472668db154df97085ea45b
font_02_sfnt_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11793 17884 bytes
SHA-256: 0a0bf841c353bf44453b762b073f953571522fa0cab4b4430888f73f8d0cd5a3
font_04_sfnt_off0001473b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1473B 11000 bytes
SHA-256: 0a8b406e8ab956d6453b8c755e8f3a973c43f538248fda5c2c4d7310d5742905

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