Malicious PDF — malware analysis report

Static analysis result for SHA-256 90658abb6b7030e6…

MALICIOUS

PDF

127.5 KB Created: 2021-07-07 09:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5509e52f11aa30643c20aa6d0b978a1a SHA-1: bfdb18c397dffdb4bd9067c209dee85187c30a29 SHA-256: 90658abb6b7030e6ead1a874d188031f92ee49273d5a39d7f577dd8b3b1734a1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities or contains malicious content. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites and disposable domains. The primary goal appears to be redirecting users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/bozubujopufikotaru.pdf In PDF document text
    • https://volnynaklad.cz/data/file/30430442411.pdfIn PDF document text
    • https://puppometalli.eu/file/piximoxuwirajafobe.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/zovifiwi.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6328869a6---raligedegam.pdfIn PDF document text
    • http://4bx.pl/public/file/27582263756.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/697b644qo3rnl02h230p8lo1qi/sirizozotivunifawoxutaj.pdfIn PDF document text
    • https://artenika.pl/fck/file/98957209169.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b6ff794f0bd1370398a48342fdd2ee2b/77177763157.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/94919628483.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/62852858163.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/niwagovip.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210628_AB1171CDF5EA48B6.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/0d774f85f3835dec8ae9c8bbab2aa502/mofusaminosuxogipalif.pdfIn PDF document text
    • https://irantruck.ir/data/file/pebugamowewelivutizoboxav.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16097c6c21d392---68830502967.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/d0600839ee7dd2d7db6ff9e9ef2d8bf8/balevavodaxuvepevonapol.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/80f43bd2efaca124a487f23c8c2e3c9b/wenaruwogazofafolebopeb.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba8d902c2---78803390680.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094886c328cb---47532918026.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c263a869a4f---xopogidixonepepugemeku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=wnep+pa+outdoor+lifePDF 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_off00018cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC1 20248 bytes
SHA-256: aeb7c80a693fbad576a19ba5ad146c5b65fbd483a970dfb63c1bd9df2ea95321
font_01_sfnt_off0001c117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D92E 10416 bytes
SHA-256: 6c0fbc4b908eaa0dcccef48bf3488f8a9ecf27055dc430c348e87f7ec9176183

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