Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fb2439cf09885a…

MALICIOUS

PDF

86.2 KB Created: 2021-08-01 03:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e5d6b88f8f306689b8bf3ae6355f8fb0 SHA-1: a0ae54833f8fc8c41477947801ab274215c3c0e7 SHA-256: 00fb2439cf09885a97513a610e61ea5878d7243add461919398d43228f51298a
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these linked resources. The document body is unreadable, but the heuristic firings and URL analysis point to a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://moon-villa123.com/CKEdit/upload/files/wewadato.pdf In PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701f7c2096f---64711908147.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/lukivojowefa.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/33392346669.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/15441546815.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/jakofemikoleju.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/86908773160.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/zabatugulosipakitagofa.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/logoz.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/79bsvp3h4iijsrhm939si2fsnc/94154102238.pdfIn PDF document text
    • http://skncn.com/u/files/31603905189.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/lezinujexaxeravenemeg.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f862cf42264---pegizif.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/20939449260.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4efc942cc---50217307920.pdfIn PDF document text
    • https://shiphangnhanh.net/uploads/image/files/69454172708.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/tomaporalu.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/mimogozudosuviwub.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/69560630713.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/15aa9b6ce1ade0294b4812bc90f47071/69564485302.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d872c56bd0---79204634679.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f2b39e399---49575450139.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/96256428885.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/27525576667.pdfIn PDF document text
    • http://lukinserv.hu/file/nemiri.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba321079df3---63596167870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ample+guitar+m+iii+3PDF 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_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 17140 bytes
SHA-256: 1f40ba90dd9cbe53cb07da61d5161c6f9abad06960896fef46a1f0b56da206b8
font_01_sfnt_off00011ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD2 10456 bytes
SHA-256: 295492f9fbda75cece7496d77a7360ca07ed504fbb1ddd7a97822c6f67aa9834
font_02_sfnt_off00013296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1