Malicious PDF — malware analysis report

Static analysis result for SHA-256 97506e0faa88c11d…

MALICIOUS

PDF

70.3 KB Created: 2021-06-14 07:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55db80dc1c70e723b4e377d5a4a6cee3 SHA-1: 67baa15e0e79ef0c6def95e170022ee40086e886 SHA-256: 97506e0faa88c11db2269d546c7329aac6c4e787e32742b00e2382fcfee629c8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to compromised WordPress sites and disposable hosting, suggesting it is part of a phishing campaign. The heuristic firings indicate it's a link farm designed to redirect users to malicious content, likely a phishing page or a malware download. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crewmak.ru/uplcv?utm_term=real+car+game+download
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/dfa228835f908700258d6064f45cab49/lobedikakixivudok.pdf
    • http://sosonomo.com/ckfinder/userfiles/files/31868487827.pdf
    • http://mawaevents.com/uploads/file/gepisuduredosul.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/vajes500lrle48t368jhoapolu/mopopudikos.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d68de8ab0---kazakumufikezareg.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c42d384f61---21698615390.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5755beeb98---48907751419.pdf
    • http://castrolmintabolt.hu/images/upload/file/55971579797.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607c50f4dac01---fesugarinas.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/f17aee43408feebcc8534252b28f2358/molivagugavedow.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/5b1277960686c3b32617de3b8b208f29/zekatukelenowanujajoben.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/956b5d450e73647b6fa01f5652f21fde/41143678238.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160760eacd833f---9900733135.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb5671a5fe---bebisovekeliz.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/67776554462.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/m8bludnocpv3s71imbapvihvd2/31993578956.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf8.bin
cad380e46d53d20184684e40b8d8d730006c6b48f0e22b3c98188473770c9656
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF8 4840 bytes
font_01_sfnt_off0000db56.bin
14c50d5e657c9b6cc7baca2f28e7a2b01c5115c4679c017c5d56ee03eadc09e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB56 10300 bytes
font_02_sfnt_off0000fe5d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 4324 bytes