Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ccbc23eeab9a9f…

MALICIOUS

PDF

81.5 KB Created: 2021-08-17 13:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c27b09b04ecc5aab3cc2b7f2e7cb9bbc SHA-1: a135e6233abcd02ad7a1e6dfe1b9819c1dfd8af6 SHA-256: 60ccbc23eeab9a9fa43920c0f91977baa9d94bb748b453c826fe36703fe41384
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress installations or disposable hosting domains. These URLs are likely intended to lure users into clicking them, potentially leading to further malicious activity or phishing attempts. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution scheme.

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://wastran.ru/uplcv?utm_term=apgar+y+silverman+pdf PDF link annotation
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/lem115ccmgu8hil940b5n4phk4/wezolaxuxow.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/senitadobenenowejumubo.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/30790838621.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611503cfb50e9---4410417529.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/9670163082.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/a85ec6cd8a9bfc5af71dd5bf986ede9c/60230382811.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1gkuu8aep9d5uppagnduf7ulk6/40256064022.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072678d2acf6---besujobibakamasura.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/88101315408.pdfIn PDF document text
    • http://aldercrest.com/files/92572907138.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2a7d8bc06---moligetotufuporadaso.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/rajati.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/dugujofukurowatixu.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31c88a6a23---mafinuzafexotozifujoz.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08b456e5ae---mopofujiju.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/lilasulolemisulubelofa.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/7324161654.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/85165432787.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/nifoxuferubemozosane.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/soniworuvafopum.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081be2e5aa08---74473281398.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160f5fbfdef808---58851965791.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/7a3178c955b02b7fce0de57ecbdcc17c/50026240131.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/3846698712.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_off0000da4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 10784 bytes
SHA-256: b6184485a7e17e228795538b89e9fdce1081787b2c9e8076dd861ec02a295f78
font_01_sfnt_off0000f2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 17568 bytes
SHA-256: 3a9383292ef49f5d8346b1642854e84261e03ac972bc63f9f652412b0933d655
font_02_sfnt_off00011eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1