Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2705ce34bb6a1fb…

MALICIOUS

PDF

76.6 KB Created: 2021-09-01 04:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f1b87addf0a25ec9eebb81a9da8a4aec SHA-1: 1afcea8678f7e2ecb71d999e8fca9708fc968309 SHA-256: a2705ce34bb6a1fbda4c9bd7f0505ff3adfe23f5c7e22f3ed1dea93a1b1ee0e5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The PDF structure and URL patterns suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://infrive.ru/uplcv?utm_term=characteristics+of+metaphysical+poetry PDF link annotation
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/24cd54fd34cede689f42f80e892a234f/35109924681.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/vasimarewilimu.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb4833ffb9---mobizunepetunigukewegim.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/64421203741.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/26969033589.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086ac3abfee4---fubigeguvabotupigikuweful.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/mr20bsgi0oo1h3qbnnrfopbopi/misogagivemak.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/k494v7bcohg6oaeeusd030hnsa/32891091611.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/padorufapebagigapivibiva.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612d05c6f0a81---53768228455.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a0f7d5d7---laxineruzer.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/tesijoxetemoxalozijimakog.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/32d8c49bb5c351d3d1532276deea88ef/34510072488.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82078ddf6---35559429824.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/ninafomi.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/dc8cbaf6d6bc8c086df541a916d83b31/20516902254.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/750af3783827a04032a35196ab6d1dd7/74566032216.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/63615756433.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/mefudagozezosususunigud.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/lavurimevexozoma.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/gutegiraxe.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df142ac5195---74779361485.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/92fb3e4e150a698b187bec7125fa684c/xodibujis.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_off0000c6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A7 17684 bytes
SHA-256: c4f1ff65a6ab5986cba44ea002a805882250832f88ffd261aee18cf72d4d0181
font_01_sfnt_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE9 10784 bytes
SHA-256: 5e4cc6b330b11e7ff827fec025a1c4e5421fda1438414edb43a077095536a6fb

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