Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0827294ee9aea7c…

MALICIOUS

PDF

106.0 KB Created: 2021-06-20 08:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 79f1fc9eb0c0a52b13c016a3668017cc SHA-1: c689d8674506280419e0d3e3235f1ffea274b9b9 SHA-256: f0827294ee9aea7cd625346f595b54ba09c80e7f3a4bad348847421c95bfacc0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites. No scripts were extracted, but the structure suggests it's designed to lure users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://cka-shiba.com/ckfinder/userfiles/files/1017187882.pdf In PDF document text
    • http://amon-syotengai.com/userfiles/file/17313451481.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073a615346f8---devakifedi.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/6589b571ede95b760723052e21ace1b8/66639443846.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b211f2bc91---lepowusanixubejamemejik.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/lolawivazotibigupeg.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/77713859673.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/37988457088.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc8d09f6a---zezuxogejivel.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf5d682bf3---83403061666.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/3ca70e7a9f6e143463b78de722c058c5/21161506240.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/rgnilqpm31am83g87b1utkp8s7/17833687164.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608faf8d787f4---62687336077.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087451e8c2d5---gogamif.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1c952794caa7996f30e98d7ea1fb348a/xupubomamosusanu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=auld+lang+syne+pipe+sheet+musicPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A12 3664 bytes
SHA-256: 844b353967df844aba36562cec2b0f45bf96f918e43c1a840bf72581b336d340
font_01_sfnt_off00013731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13731 5256 bytes
SHA-256: fb4c2aad167c1420c85610d619a959dbd45d504c246b4750a8f3610d910b3bcb
font_02_sfnt_off000148e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E3 7032 bytes
SHA-256: 96e977bb4f378734d305da3a6950d48b96cf6d24455cbcdc2d28a99e000e5681
font_03_sfnt_off00015bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF9 14444 bytes
SHA-256: 1e4f10727c36ca3732aa592f096ef02332628e430c7a36d9c9be172f6dc093db
font_04_sfnt_off000189af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189AF 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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