Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d09286a90c06f7…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 23:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 818582f1ae2d80943e931919579209ce SHA-1: 243b0b7df2ff8d98ff3f19d820d5ea40e2147a49 SHA-256: a6d09286a90c06f7521360083aa1c1b3d905e7dd499b50e57821cecfeef2e225
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ketchas.ru/uplcv?utm_term=keyence+sensors+manual PDF link annotation
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/48d4dc2c0b11871419b6a0df2854da4b/dimizaxebujetowog.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/q6odi4qa0dujp5ldh7ti1k7661/jewavunizireleb.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/dexuxapimowubuwemo.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/xidadepigaxekel.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/lerufokojugiz.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/4627840482.pdfIn PDF document text
    • https://careoncall.in/userfiles/files/99089064258.pdfIn PDF document text
    • http://webursitet.org/Files/file/76128605062.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/31456668090.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16092dc774bfd7---zapono.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/52689147986.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/tu6s49dfvod7hv7b829ipm1bf0/domidetaw.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/82864456943.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/46162865799.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/c09850697cd904e56407e4931b1a8fbe/vaferu.pdfIn PDF document text
    • http://www.asslar.de/downloads/33218067397.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/mezegu.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/6chgh57d9u1c3p3lcti06m7lvl/vubugavijerorulul.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/15000736526.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/59858569005.pdfIn PDF document text
    • http://www.toptehnik.si/images/sevanugizuroxogi.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ac1122272554b6913bb07e94291b515b/36667401634.pdfIn PDF document text
    • http://prosquash.by/data/forasimepatijumi.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/3915531015.pdfIn 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_off0000cf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF71 10408 bytes
SHA-256: 6ca69298b09c30dec1a492b18ff6d14ce55d557f06164ec91fa4e8abbf455288
font_01_sfnt_off0000e70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF20 18016 bytes
SHA-256: 687c41e519615d9cf0023783307561f20bc817c2ba118141360a2b412a0dd2e2

Open this report in the interactive analyzer, or submit your own file for analysis.