Malicious PDF — malware analysis report

Static analysis result for SHA-256 463242d00a577fcc…

MALICIOUS

PDF

87.1 KB Created: 2021-08-01 06:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 75b0d4f75f0d82244e6e55ff03f44025 SHA-1: b103e9f695fcf76f7d2c79a616965975896b6a49 SHA-256: 463242d00a577fcc0079bcb55a48a5aa86a1b45e548cb2e4d3a896ea5d76e68e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs and link farms pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+to+renew+prc+license+online+for+ofw PDF link annotation
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/gr9oanuvup18vba89uqh9r9m60/77909421905.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/80d9bdb6d67c29574222e6b4c99762f7/fizexujurewijediguvug.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53609ec9ef---23585166075.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/c67274d516563f841ab6945293217845/soxefixefofezupiruwoxaja.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/93496257221.pdfIn PDF document text
    • http://alltechsro.cz/files/61201699419.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a8e646967---53815972462.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5006a240ab---28302209074.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/boj0csiuldm1447o2u5dqauvg7/puluripigelisefalodalo.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5bc0770bb---85790840632.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a6bcd045---kagulakaf.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075939a74e17---43477896632.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/pavedajopogusukuzuwuva.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/f3c3fd659c7707d3806b02f59c95760b/13440071789.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160807d085238c---28032761812.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/46955576548.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2a74c3a98---xodofusijimiresow.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1fb2a6c9ee9c2d923bbb21a6ab1c87d1/dobobowewiguvujuvoxew.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/pimesutanuduvowoxa.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/84100457588.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/34638112368.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/nodick8eo6pnsne3gf90n8jvk5/26728295537.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda7724853a---54951876622.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/66052461101.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8a9708800---rozomaxakexanetikeresu.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_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 10388 bytes
SHA-256: 0dcf917674aa4d81610b833ebd78d3d33005826c787f5294d003a37bfc25b5e1
font_01_sfnt_off000109a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A7 17052 bytes
SHA-256: b1c3a83c36529170bde8e8350a600c88f545b349563b0ffc1a1bf49b451caf36
font_02_sfnt_off00013616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13616 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1