Malicious PDF — malware analysis report

Static analysis result for SHA-256 9809d8aa8702183e…

MALICIOUS

PDF

89.7 KB Created: 2021-07-25 03:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2554b46b97f45d9721e1f2c291bdb333 SHA-1: 0688844af370d30f3eda0fd2dcb6455c8d8f50ef SHA-256: 9809d8aa8702183ee15f6ae644a3108a21732bc2a814ddc84c953876f740c5b5
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://giritrademark.com/content_files/files/47103759659.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/69564e1965902fefe4e89c458b01c7c6/94631664091.pdf
    • http://jtipartner.com/ckfinder/userfiles/files/77164484607.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5e8aa405---nigokipowuruledamar.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/4800c0916dff6f55c2456f1bed5e0ac7/newelose.pdf
    • http://akinmedical.com/uploads/file/78520436909.pdf
    • http://aeronautike.com/userfiles/file/sidujoloxobuxadonuzam.pdf
    • http://cobe-ing.it/userfiles/files/sonaleloz.pdf
    • http://poolprotektor.com/userfiles/file/54913375316.pdf
    • http://ecolservizinettuno.com/userfiles/files/90600223054.pdf
    • http://bbfederico2.net/userfiles/file/87776215174.pdf
    • http://vetportonaccio.it/userfiles/files/lebopefubovexekel.pdf
    • https://vinadesigndanang.vn/uploads/image/files/36018966015.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9010f022c---xoxasivefixanegatina.pdf
    • http://pappteam.hu/userfiles/file/73737973999.pdf
    • http://beveragesgs.com/userfiles/file/14300048103.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/mokawinajis.pdf
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/tetuvevabukelo.pdf
    • http://axiomestates.com/userfiles/file/54906159091.pdf
    • http://botosani.ro/img/uploads/file/69706736091.pdf
    • https://aymfly.com/aym_image/files/japajeno.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b16ab1db0c---medupixovidunibexaleti.pdf
    • https://galerieportelouise.be/userfiles/files/filamemitabutuwafimaze.pdf
    • http://bestbuyfromindia.com/userfiles/file/29509221012.pdf
    • https://creativitagh.com/pevron/www/img/file/gijezeju.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=heces+con+sangre+en+perros+pdf
    • 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_off0000fae4.bin
600c18c3dc33b94cc1687982cf71482ee922282251ecf0ac3b9b426719dabcb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 10552 bytes
font_01_sfnt_off000112cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112CD 16792 bytes
font_02_sfnt_off00012adf.bin
efbd291356915525ddd44639057cad67bee504c1925de065019cd741aa3a2ba2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADF 17244 bytes