Malicious PDF — malware analysis report

Static analysis result for SHA-256 4566190d14a09bd2…

MALICIOUS

PDF

78.5 KB Created: 2021-09-02 07:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a702cbf58f9e8eb967d2167fb941c1c4 SHA-1: 6f228458a3a3e6bb50834c7524ba06019a243c29 SHA-256: 4566190d14a09bd230ec52c43a6de8250a2ebe73a36e7a097a0e05060b8b9a9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics point towards an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://inwebjor.ru/uplcv?utm_term=the+law+of+attraction+changed+my+life PDF link annotation
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609606546a9b5---99975719518.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9d9d4ba1be---lunekuwow.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/96q5k6etp6qmqds7c321riq4o3/23492207306.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/87325785189.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b902a59d78---28832574855.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/sidibotudep.pdfIn PDF document text
    • https://scriptdd.com/_file/file/vexeleji.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/gagagevigidujefadume.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/60710861578.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f30770026.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/tusepenevomuruvenu.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b471391d6d7---libodaxibakopaletaf.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/nuvug.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/27290347136.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1acfca7cab7d2bb301d433fbaf19ce37/5491560018.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/majanorexoxoxekadojuniraz.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/dajimifeferuvezumap.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/fanokag.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/ae4116c624c547c55adf47baeeedb5bd/zizunetemasotano.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609250a3ef7dd---zuwunuw.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/39698631259.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/200672833.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_off0000ceb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 17252 bytes
SHA-256: e4a04736a7b357a9c157f78584de1f84911aaf263a0dea15aaad9a2cfac43c3e
font_02_sfnt_off00011358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 10916 bytes
SHA-256: e7cb511549d4997a2b4f13acb535e634638e844a4b0ddafb7830a2ef9c8638eb

Open this report in the interactive analyzer, or submit your own file for analysis.