Malicious PDF — malware analysis report

Static analysis result for SHA-256 880ad6b71254b39e…

MALICIOUS

PDF

79.4 KB Created: 2021-09-03 00:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: debd15d7a042d0d7823c719583e6b2d1 SHA-1: 91a33142c590a5944b2aa672cdfb3ca908ee5542 SHA-256: 880ad6b71254b39ec8d380d1b0c5bde465637591d3969d7a435147e12024ffed
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links likely serve as lures for phishing attacks or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://drafthe.ru/uplcv?utm_term=marketing+price+strategy+pdf PDF link annotation
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/25799812b777ef9fbe650b822e1c8a1d/46159299869.pdfIn PDF document text
    • http://biosite.ru/images/news/file/13280481919.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/mironedaxa.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b37d1a9260c---60907364714.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/remosijamuxupeko.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/33357842997.pdfIn PDF document text
    • https://luminex.pl/upload/file/27326391838.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b07fc41de---60257619636.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/pizexawokapoto.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/efd02c0c8d99dd5bd75b0e6cadbe8a93/sarimemeruwilimo.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/4726642858.pdfIn PDF document text
    • http://maybomchuachay24h.com/Images_upload/files/9639543055.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/79561191403.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/walotam.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/72577650772.pdfIn PDF document text
    • https://j26clean.com/upload/files/41148417691.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/84a3cdf0b436c428daeddd7d1ad28632/17769932104.pdfIn PDF document text
    • http://cityhighclassof77.com/clients/9/9e/9ea685038b5a197d2022a69b8c6b162a/File/60711876061.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/56096991879.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5a17c424f---kemusoga.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea0dd08e94---puniv.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_off0000d290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD290 17176 bytes
SHA-256: 454d9814a3e548f3b1d9edff12db30bac9d80983d468b29b803e34a7e2d0706c
font_01_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 10828 bytes
SHA-256: c533c80c524b5453c9eb4deb265edaa9a9c5eba1b4bec34acb37d29601140b9d

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