Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d620282a16381f…

MALICIOUS

PDF

82.1 KB Created: 2021-07-13 18:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1415f6300af67e6a350b0daf1ff5161d SHA-1: 014136919663a6c3abd2a03385808c5552f021ae SHA-256: 82d620282a16381f9a0b084e77f0da320806201fd1f9e663c110b0624685c3f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links are likely designed to redirect users to phishing or malware distribution sites, a common tactic for initial access via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c012a774d0b---20721215679.pdf In PDF document text
    • http://quickvideo.nl/userfiles/file/savavazobomute.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/24265732358.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/afbd3fe52f67b85cdfa1ee68ab0c2e35/sulagapipaxenolajupes.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/14922476006.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/68313649578.pdfIn PDF document text
    • http://veivel.com/userfiles/file/nuroxemosomavivomoxenefa.pdfIn PDF document text
    • https://hgb.se/filer/file/jujivirelibenugetaxiw.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a6e9e761---57157502352.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/885b69742107407dfe12c0ceca5510c2/69360680671.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/bawaxumujizig.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/48945e42db75b33d4d87cf1af9fc9a73/11852320111.pdfIn PDF document text
    • https://asi-filter.pl/files/file/sorafedozapusefaderuk.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f1085467fa32eea0cfc1e4b1bef7b5cf/44883195386.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/kidoxojinibobiwo.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/votumisifirurezexediz.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076b05bb5ff1---depomusosepe.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608edcce17677---56858262900.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99e5075bf---daximavulusomozojekobabo.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/60121329766.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/8rtu4af6054f6vll66tffum187/49478342349.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/sukiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gcf+of+8+and+10PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000defe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFE 10256 bytes
SHA-256: 48488609177278fe992cc1497da6bf368fe77be384362cdb3f8c0bc890cff11b
font_01_sfnt_off0000f624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF624 17424 bytes
SHA-256: 6125facc2aabfa74d4f4b6bfa99d31c869fbc9b491decb11b523c84f172b1acc
font_02_sfnt_off000123a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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