Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d0369c82f8e6c9…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 03:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 53fa6c2ca31527cba4db939709807ca0 SHA-1: 7bec750928865d5682cd82c50ce532bcf0f4b7b0 SHA-256: 04d0369c82f8e6c985a0e1961b079c2e518200cc88c08bddbf9767744cf5376f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. These linked PDFs likely serve as lures for phishing attacks or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dba910670b---bosajurisagazedi.pdf In PDF document text
    • http://allg-gyn.ch/userfiles/file/zaxupifuwoxusa.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/bb204eca2ad3b8fead3596b32ef6bf8b/xokobeveralafodakilegew.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea3d9058f4---12846328507.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/bikinopijixurupami.pdfIn PDF document text
    • http://vipdiler.ru/files/file/70420205878.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/48754972321.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/775ea9d6781de64534af3989d5a534ac/62572505453.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/132395f5c86a3eedbf1e55a5c3995fdf/savuzo.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/efe89082ae1d1200e229f9d4681c3711/38709404709.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/cabd62948595cfb96aeb9e58a0b7199b/37674485460.pdfIn PDF document text
    • http://briarcliff68.com/clients/71184/File/sokigumewunexokuniginas.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/34372386365.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/ab589301f9414d9ee198275ac2edd501/furobivixozug.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/50165026347.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/xopoxepugivixigot.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bac9f0bf187---27211887004.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ulr4gajnjhobu23387ebg6cro4/98604382502.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/3fe36aa638e219349efe486c2b8f7021/33286332410.pdfIn PDF document text
    • http://mopron.ru/upload/files/masirenivopivawetenax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=carlson+quotes+of+mice+and+menPDF 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_off0000e508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE508 10916 bytes
SHA-256: 5082dbcb9ae92a996a819f6e66a07db06b414a18c52f7278189ad3a011c3bb5f
font_01_sfnt_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001162e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 17364 bytes
SHA-256: 0aaf1f609d51b1f83cd40b5c9811982a9bce7a9fc03c4c2bebe579e1458c8f17

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