Malicious PDF — malware analysis report

Static analysis result for SHA-256 199e15902134983e…

MALICIOUS

PDF

108.6 KB Created: 2021-09-06 08:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9988926d36f7c0fc75bb4a4311dcc037 SHA-1: 5277c6deabd4eefddd07dbd7d37c52a69bfbc7ac SHA-256: 199e15902134983ea03b0b075031481cfbca7a3c7cc6f2db8fd433839ac755b6
156 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDF files hosted on various domains, many of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these linked documents. No scripts were extracted, but the structure itself is designed to lead the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210718114634.pdf In PDF document text
    • http://pc-driver.ru/userfiles/files/97810195287.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6c5c04936---vujenawimenabinoxop.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/renanifowetus.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/6332c25e603e7be03a509b401c9931d1/diwolaguzixotulavawedefe.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/farevipinuweji.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d462b27d190---dopekajujisosoxixexexeb.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d51e5d0c7---divimetomulikomusuwibeva.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed9d1443a---87615987340.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/022694b8497453e331a6c5cdd9b88075/sibazobeb.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/gerapubokodexubatuguwekog.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/15720438754.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/1062961743.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/288a044c708b5ff9269131a966c63ad3/zuxaxadowekuzomesisedip.pdfIn PDF document text
    • http://petrduchek.com/files/kojivipobebemibibuwajabu.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/norinipileranitesokof.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/91582376239.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/dd1febbbb8d784c275f34e99c22745db/wibezofedudekuwe.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/netefuzodofaxumadumuleri.pdfIn PDF document text
    • http://cristalensi.com/public/File/63799692551.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-7///2021725628127787.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/16157231364.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075ce685f7a1---dotedetowexeni.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/4frmqggqhtkqopedeki6k45m87/fasobazuzegijadi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=circuit+specialists+pps2116a+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F64 19928 bytes
SHA-256: 70bb92008f1a5b2ec34e5b33a7af75bb8624c5d7f62d44fbe9ab6d5cf7ca7838
font_01_sfnt_off00017346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17346 10888 bytes
SHA-256: f97bcd2b12faea70fb210f2d51150c92db7e295b384cf2e6b7bb9548a37db15a
font_02_sfnt_off00018c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.