Malicious PDF — malware analysis report

Static analysis result for SHA-256 987d5313e408feeb…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 02:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4a5d474bdf112bb5a2691c6d4d5f7be3 SHA-1: 01728f91ff4f70326f2176689ac85f3164a7315c SHA-256: 987d5313e408feebbc49643fd29956588d3348299839d670377b122f5231fd56
176 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF URIs, including one pointing to a raw IP address, reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://gptools.net/userfiles/file/razazexebovigakov.pdf In PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/ldfi46racihf6ttkrkf9crjmam/gisat.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/33904974208.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/fosenafuzila.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/koratotutipifixufazut.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b96f3114c1---vurafig.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/89261012795.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/99757430210.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/timefifoji.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611eac6428936---mopofizanisusomisufuduta.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/6138572966.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/64126084548.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/bipolunuwavozewezu.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/3603763186110eb8d601ad.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16123565cdbbdb---93904804826.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/lusoguvabekenelowavomo.pdfIn PDF document text
    • https://whitesal.com/data/images/file/4413_20210518040330.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40d80a8044---72307089144.pdfPDF link annotation
    • http://greenlivinggarden.com/htdocs/UserFiles/file/79722544753.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/839ba74d132a13223d0ba1c72f562dad/livobemexowi.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/97825579389.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/mg8lkeo78hin4lk0c0qf8rhvn2/jubogazurejofikupe.pdfIn PDF document text
    • http://skomi.ru/img/files/file/98100546556.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/39985380695.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/tipawaxizifasifelirusefoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=catalogos+cklass+oto%C3%B1o+2019+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AB 18840 bytes
SHA-256: ab53bad1e1189e42ace9f022dbf970ba22ae46a19f8d3d4f24293fd484c159d2
font_01_sfnt_off00010661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10661 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E78 11156 bytes
SHA-256: 4aa6eef9af99b22be833928ae23491654b8a1b9947b14535ae53fa9709c70ab1