Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec69e42c46f8bd7e…

MALICIOUS

PDF

70.5 KB Created: 2021-09-26 06:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a67467bfcb94db12e81a00ad310f7a39 SHA-1: 8a4d8bfc0b3bc2c9e39734964f3c6d9c5e0bf01c SHA-256: ec69e42c46f8bd7ed48ee35fce592f413d81fc05b01c701d6c9802714f6f700a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file functions as a link farm, directing users to numerous external websites. Several of these links point to compromised WordPress upload directories, suggesting a tactic to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://find-domain.lazy-online-shop.com/app/webroot/userfiles/files/mixutarejiwaw.pdf In PDF document text
    • http://vindindex.nl/images/uploads/risekuvede.pdfIn PDF document text
    • http://alltechsro.cz/files/76901110127.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/45234b14ad576bc66dbd8eb9fa52a07f/tilawijivoripe.pdfIn PDF document text
    • http://jar-ted.pl/file/24147819551.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141887cb1f1b---wixidonuwujava.pdfIn PDF document text
    • http://jacsonsfurniture.com/userfiles/file/zuniw.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/10411884407.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161380ba6dda84---63249118143.pdfIn PDF document text
    • http://shopabrang.com/images/files/68606301888.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fabb4d877a---99632419522.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210906210111.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/zagasekejazariduju.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/zemawerololunisex.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/25397537492.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/161333273e7ac7---69622699277.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/wifexiwelaxufuvadejoroxek.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/4b9986c91e9c55ebdf4864a605b89f63/tokirujefesodubibarusuta.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/luweg.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614ccd87eb325---60304495611.pdfIn PDF document text
    • https://agriturismoilcolle.org/userfiles/file/xesutegagokotojimenapu.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/25480560047.pdfIn PDF document text
    • http://scpt.it/userfiles/files/livexobexabam.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/15536802860.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/kepekuzagumumipotelalanoz.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/kutulofivizonobirolalofes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=share+pictures+from+iphone+to+androidPDF link annotation
    • 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_off0000b423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB423 11016 bytes
SHA-256: 8a8a8022b954d1ab02c588f6470a3cec8d491852d5605d0585c52fd24c48c78c
font_01_sfnt_off0000cd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD89 15432 bytes
SHA-256: c109d264343ed51fb60faafae8cbd83d30013261fa5d82b2a0184449bd352f84
font_02_sfnt_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1