Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ae69a1fde32119…

MALICIOUS

PDF

152.4 KB Created: 2021-06-26 06:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6f1f299f46fc281abfffe31f688f819b SHA-1: 3b1669b69e79d853a25659cf59fa5f8720cc71d6 SHA-256: 90ae69a1fde321194f47a089ac27d4437f7bcf8659d19ba7ca4d137a6394cbab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is designed to lure users into clicking links that lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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://garderoba.sk/images/_file/84656256233.pdf In PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/56821055063.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b716faa94c4---wijivumafofufewakewesor.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/buwazek.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/9402d45173937f2ff3818c62a521744f/vojimixetijewenoka.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160928549a1303---kikaradukenipoji.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/211013a35953ad33eec5ef03fa148e96/51497941080.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084a01bca07c---dutovokorosuriladamow.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/56429334723.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/37787230630.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b08a0b32023---37393030716.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/25765330124.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d78de1c70ae44b63767284a2a2a6cb5f/87914192343.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/9gqbeqk40fi13ptk45pnjivajs/23890960851.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c3354b9bb5c---xavodonup.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb625ef428---nejidikibuwadujipe.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/e786qd80piitv0s93mqcv4s212/pevirigudumafev.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/fudisododibajuzusoborovo.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b882d08e2---vukazubixosakuritapejixag.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/jinugo.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abf001b922---91157774624.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bab0078c1---nefisekiwiwojoliwedov.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/knl8v05v29focfjejurahcbov5/damobujedizanodoseramum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+math+of+life+and+death+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ddf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDF7 10456 bytes
SHA-256: da2b354b7167d8453d44bee7955314b25aa06988cd7af72745540b32267c40e4
font_01_sfnt_off0001f572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00020d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20D84 18732 bytes
SHA-256: 1303db369973d88b0293c9ee458b1ccf24124779b48fe3a9f6e03931830dea34
font_03_sfnt_off00023e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E76 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825

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