Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ac55754d3fef7c…

MALICIOUS

PDF

79.1 KB Created: 2021-09-18 17:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1dd162a0603b4dce35c852d7267f5bc3 SHA-1: 97180044924bd98e4e83eecdf6cb8716c650fa0a SHA-256: 29ac55754d3fef7c183f42b527d1861356b6414ebf02f3f6c94a47e7a5b56af9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The presence of 'utm_term' parameters suggests a tracking or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://synerhu.ru/uplcv?utm_term=pocket+iptv+playlist+url PDF link annotation
    • https://jagominum.com/contents/files/88719337313.pdfIn PDF document text
    • https://ms2oke.com/contents/files/fakekiget.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/2a07be6ecb3adf8014db39d5a32a66d1/7223147512.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/musategojekuso.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/diraj.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/3803889564.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/dakoliwurisozikudaxukiv.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/82602968185.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614306b94e044---7939806960.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/33196506629.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/zavasipenebudi.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/falimod.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/majezez.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/47444379937.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356bf62cca8---47792148150.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luvuxipu.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/60183232048.pdfIn PDF document text
    • http://moneymaker-gold.de/files/55375535384.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/6c352e4cc864c2039ea70a9185eae402/gosurosex.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/68326652919.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/kiwitujixizuxigilarivufa.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/85008349645.pdfIn PDF document text
    • http://regmac.net/userfiles/files/timepatujemedojegupuzefem.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/lilanazitodirewi.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/67919699145.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/jurijopepilowuv.pdfIn PDF document text
    • https://iptv4sat.top/france-iptv-fichier-gratuit-liste-stable-m3u/In 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_off0000ca56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE268 20036 bytes
SHA-256: a555e12a732422fa4129f91842e9e1a7001352d8098fce3ea2f27af43db04194
font_02_sfnt_off00011694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11694 10636 bytes
SHA-256: 1fb8f3fc7b693b45f66924a0adc0203440536df5e3a0917a91e0652bf9aecdf2