Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f74fc2541f9aa5…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 08:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 317804a1826c272e56c6cc4e876b7e97 SHA-1: 284eb9aef47de8964cb4b2f3bdf11e6a897e2b04 SHA-256: 19f74fc2541f9aa501d2ca9de578ee65c98f2d371b86a20711f7d8c88a003d6b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are part of link farms hosted on compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'SE_CALLBACK_LURE' indicates a potential callback phishing or tech-support scam pattern, further supported by the presence of download lures like 'fifa 17 free download for android'. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=fifa+17+free+download+for+android PDF link annotation
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/8ec889ac054abdb5eb1f21a2c905b376/mitivosakefare.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/tuzefugavifekisobul.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/52775231834.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af24ae7853---77518697225.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/69403379384.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/tujunomofikaralilojajol.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614099d151bc5---topona.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/80651606486.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/37528236042.pdfIn PDF document text
    • http://jsjxh.org/filespath/files/20210904171308.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/gavegibodubudusuzo.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/xujikepujigozobidovadu.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/gadadetut.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210908025412.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1631029729.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/fefebi.pdfIn PDF document text
    • http://airserbia2009.vs.rs/multimedia/file/36858278115.pdfIn PDF document text
    • https://mkart.it/uploads/file/41659393008.pdfIn PDF document text
    • http://alvitraders.com/files/vobotegudoko.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/xuzarujebobidizisepuwo.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/66183945101.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/tarizukuvozufubesitat.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/bozolobesijuba.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/37575580623.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/1446e6287cfd3a48542e5cd713a47ae5/bojuwelufuka.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_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 17280 bytes
SHA-256: 47c931bd655e549d22dc5f0028b18d757a03032b1225d23d728c446a39a8c6e3
font_01_sfnt_off00010cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFD 10244 bytes
SHA-256: a7ac20fa3dc3bd6c9a6f289eb62b07fe512e8a27bebccd2f8a1e51badc89eb12
font_02_sfnt_off0001242e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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