Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5e4b4afc0fe208…

MALICIOUS

PDF

83.6 KB Created: 2021-09-07 19:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c5942f19d85e6ee920ca2de6b7d203ab SHA-1: ed2b71fc728a761c182aa452672320eacd976432 SHA-256: cc5e4b4afc0fe208c477f7df75184bb1c3c562d17f5b4bcbda80bca7dc54b37b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

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://crewmak.ru/uplcv?utm_term=ikea+catalogue+2018+pdf PDF link annotation
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093f71b3727b---fiwerofalojebufurazavox.pdfIn PDF document text
    • http://proxima-design.cz/files/file/61942823686.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/kukox.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be81333fa71---99723081503.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/taliwinutadizixazela.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/7c01995a40d8bcaf9f776f9b87861273/23982809922.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/xekutinijebutuwemud.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a1d04e68e---53297310742.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/padukegifozudazipovi.pdfIn PDF document text
    • http://change-sexy.com/files/files/96025977335.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/nitomamaviredoxof.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/javazizugavupobesirisel.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/t1rmgg7s1jvb5nqf7k7iaoi6d2/fupanorak.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/zirovimoxokunolegazosan.pdfIn PDF document text
    • http://simsoncantho.com/userfiles/file/kelutegazag.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/a02f37978fc2f8831063db12222e55a1/77279269795.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78562e746e---49633608692.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/70661195fbeda6265cd6939c3c4ebfe9/futuxowanikigurimemaro.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611027be188ed---sadukanurerifotivop.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/80129723060.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/ninoremigabugof.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609696b45626b---6809700927.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/87504711651.pdfIn PDF document text
    • http://learningkey.org/userfiles/xelufategezuzegajekulorur.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_off0000dff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF803 18244 bytes
SHA-256: 3c6f233a30b49f83f072c25c017b23e9990a80a1bfb74f6b9605bebbc97fdbb0
font_02_sfnt_off0001273c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273C 10976 bytes
SHA-256: 9d9a1a7294ce8effc5672b6a41515c2e0ca790ca13f3d8b7bc933eccafa2a36b

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