Malicious PDF — malware analysis report

Static analysis result for SHA-256 058c693f67d0892d…

MALICIOUS

PDF

76.1 KB Created: 2021-08-20 10:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e06cf63047f4a366dbce969b9eeb13f SHA-1: 07ffc5f7d1dedd57f4b7b54b7530cb70703ea9f1 SHA-256: 058c693f67d0892db28c508fcd649173d95ad0d2746f30425c761d0dda16df66
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://idd.no/ckfinder/userfiles/files/97401249776.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/fe13e41278cf7675e589f1f35dcb3552/63677704010.pdf
    • http://legalinet.eu/userfiles/files/gabavuxivanezinisofawokam.pdf
    • http://seanmore.com/userData/board/file/40382937389.pdf
    • https://ludifrance.fr/userfiles/file/33006117986.pdf
    • https://micro-logic.ro/images/uploaded/file/mumumawaxim.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cc982a607e5---13493890135.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/18dab23c71e7a3c70d4e398c5eb33fca/dawonabujegezefuj.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795d9eb3285---77506452596.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/48obp82rertat58h0809s76na4/bavobubiwu.pdf
    • https://thehero88vip.com/ckfinder/images_store/files/81614351528.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef0a154ac0---48894653241.pdf
    • http://geometramaurotozzi.it/userfiles/files/70011020095.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160836556ba215---90264142651.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ec24c535b---48920027818.pdf
    • http://thueotodn.com/uploads/image/files/gegefalumadaberuvilesi.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160847e45b3241---47995293225.pdf
    • http://brette-animation.com/userfiles/file/67285055062.pdf
    • http://bogelaipigeon.com/upload/file/46784524105.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32b0dcf0d3---48664750870.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fbfb78250---5195816600.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b79f1519e---17329542823.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/iq1mbvpkabgs15que1pf25lbeo/52724746660.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112e9dc29566---99128514948.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=special+right+triangles+worksheet+maze+version+1
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C7 16792 bytes
font_01_sfnt_off0000ddde.bin
ed898ab9801e7ae275ba838d07d2d6caeadb3619f021c7ffe35c7bb5418a78e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 11252 bytes
font_02_sfnt_off0000f837.bin
d833bcbcabb9a45c0f68887aec56f46d3583727b96dc19bc6400357907c434e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 16148 bytes