Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9ace235e6f284e…

MALICIOUS

PDF

82.1 KB Created: 2021-09-09 11:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 52bcaa06294f0962ae472f72d68920d0 SHA-1: d54ba32411486383898f50fedc833e4c3e2c06a2 SHA-256: be9ace235e6f284e7a8c830054ff5ebd9029d71f62c2ca8927a1bf7ddd71b4e2
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://paroissedementon.fr/upload/files/67058292334.pdf In PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a010afc9a---98322777327.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/vibovopuvadufo.pdfIn PDF document text
    • https://wecareprogram.org/images/file/21206179756.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/11448609522.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/79077841670.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wajogil.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/kavuna.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bc71c0d79---58959370495.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/fonekifiwogitupa.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/64597418421.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bcda391a3---wuratekunubat.pdfIn PDF document text
    • http://dtjxbpzx.com/filespath/files/20210901052212.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/karifosugewinorinixe.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130ff43e038b---govit.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/41613359917.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/piboninuzopinolunijinipup.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e376d7eb8e2453adb3d5adcf0461d380/kezijesavavizesatozofeteb.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16308972361242182949.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/zirazoza.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/46136040995.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/49834679151.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/27089472814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=intellectual+property+rights+and+economic+development+pdfPDF 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_off0000d762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 11300 bytes
SHA-256: 179429bbb5d45e674dc7ab77c2683e35e5cda3950ac003dfc280eebe06e64d6f
font_01_sfnt_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 19080 bytes
SHA-256: 9244c9472d6eddb3b1a818e10f73af2dbec7ea8bbd6f40e30baebb6368bf4a28
font_02_sfnt_off000122b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1