Malicious PDF — malware analysis report

Static analysis result for SHA-256 492d22720a323d9a…

MALICIOUS

PDF

86.4 KB Created: 2021-08-17 19:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c044ac65dc6b21c6f8092e5dda94e2f4 SHA-1: 9de020ac4e5075d2c998a5da503ebbaf7d6641a9 SHA-256: 492d22720a323d9aabf9c5becd2e89ed766a13dee0cdd3aa62fc76d0e5a30e01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or phish for information. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate an intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdb9fab6d1---fewux.pdf In PDF document text
    • https://meganimal.pt/site/upload/file/68330909459.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a307a6a888e---52628958794.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/vagiwaferuf.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/jecsls22m42mfdt7kl4prtsagb/84253585580.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/27423880735.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/uo5p2nkkm232dm9frtkt9qp8p4/peduxutetofobemisifo.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606caedbd2d98---somodabawofabepeb.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/cg31512juqt0363k4442gi5aum/pisudipenanabuv.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/sojotekifemuzanujefob.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4d6b8bbdc---farujixuzi.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/57802784036.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b8daf122b---lewujogutatowujijavenapo.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/3e24933f272b2212d2387428e16fc338/sosikufulinimuzoviruzilup.pdfIn PDF document text
    • https://dineflon.com//files/4958531460.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/rosikiwap.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/75f3f54668b596bd54f20736b1a9f446/xolorosopisuvejuwiwewi.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/86290819703.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/rudejojos.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/juloraboridavidejukij.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/tapenefobafiresenugosu.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e830bfd09a3---70604977054.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f213eda8a64---dowewupedulojikilotasotex.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/680345948ff16bad299914d447cfc754/wekis.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/74055984596.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e1a03a977---polosojabi.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/xozafamuzupavupoxurad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+much+is+carnival+glass+worthPDF 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_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 10788 bytes
SHA-256: 93df0f4dfd3baaa55e1f84dbfbb961c72e2a3314dd47e5d604f8f17e6b8776c0
font_01_sfnt_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA1 17144 bytes
SHA-256: fbbbce22987dcb5ed19366eb3b2d51f313ae5c08a7144d1f8c44e649c2c286fe

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