Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e05007fa9cca94…

MALICIOUS

PDF

82.9 KB Created: 2021-09-04 04:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 80a65cd7e4651ed310940d2150763365 SHA-1: a46e7c9fda2017fcab1bac73d9677ceaebfb29f7 SHA-256: e1e05007fa9cca94bbe11792cb521aa2f8ff54802122c4fb95c91691c4002655
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs likely redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/35d1c2f86dbc69412af27a237e3575b3/83606231116.pdf In PDF document text
    • http://homestationrealty.com/userfiles/files/soges.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/44564863963.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/titigizenazeterakozojaz.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/48437402260.pdfIn PDF document text
    • https://vestol.bg/files/file/46866622061.pdfIn PDF document text
    • http://simonide.org/userfiles/file/61597362334.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/44854171505.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/11347036287.pdfIn PDF document text
    • https://sayurmateng.com/contents//files/gogudetamujagej.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/wulijabir.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/99365403811.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/928d387bcbeb8fae8025823474f73fe5/jixapobejadug.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/93hr8aqbjv1pooscpfoscnj7a2/nefodorude.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/kazinaxaliwumonifobulepi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4a93641a0d---gikevivipupotevulotus.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/zofarurowuril.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/xigapukepu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2746c98272d8d76f3bdb7cbbc8f48287/99922209648.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16074505e0f85b---pawoletikomuvuwolulifisi.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/42675466315.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/88a05591080b5b991f0af487606647cc/mewiwofotidikefo.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/40957194288.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ia7tj5kjsc156ih25lfchr0a16/89116421330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=platform+as+a+service+%28paas%29+pdfPDF 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_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 16988 bytes
SHA-256: b7df95979571a6b5b0638fc9dcc6591338265e9daaad5ce75b420a4aea097e4c
font_01_sfnt_off00010c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C55 10900 bytes
SHA-256: 90d0f65b1bf201ad4cbea9747ba72fb5540ce278e1260223d389f68892e0f6a5
font_02_sfnt_off000125c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1