Malicious PDF — malware analysis report

Static analysis result for SHA-256 732994fe57158986…

MALICIOUS

PDF

72.8 KB Created: 2021-09-04 07:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7308d2d03a527dc67f99c7d32f9987cd SHA-1: 03f5c9c4e4f31e733aa4ea041bcdbef2d533bdb0 SHA-256: 732994fe5715898621a4c9980d7f78f427d8d2a7e672254b909882afa82ba3dd
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised CMS uploads and disposable hosting sites. The embedded URLs and link farm structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://robalton.es/Albums/images/file///32447992374.pdf In PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608657e4daa42---79911139121.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/58548923533.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806d4e3f7b4---98859225298.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/vqincbcasv8j1a46v4s3cevnjb/12998461637.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/6597196701.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/92ut4thnm90sl1q1tdvtq46p01/46019529494.pdfIn PDF document text
    • http://packamate.com/userfiles/25859705935.pdfIn PDF document text
    • http://ooexperience.be/assets/Image//files/8140839270.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/d07e5bee779aed023be29d57932984ec/fedonak.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/kafavadon.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/kexetuvaxuxajitoka.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/77470143743.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6565938bdb---51793919173.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/0c103aff397497ff04729a44f9048334/rofatudadaliderotuviz.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/30302993118.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b3bbde1984afa65ece765e174dcfbfa0/24824102276.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/lerek.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815719aa3d8---xefowalofasaxazi.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba12f8dda93---laturebexevofulevufalopij.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/mofegewexegowarujidit.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607806c66667f---12680178427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=area+perimeter+of+circles+worksheetsPDF 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_off0000baea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEA 15980 bytes
SHA-256: cfb180b71339da3669bb23fd5b6ae58a8ff26e9dba80a84bc0af5610141a642c
font_01_sfnt_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 10800 bytes
SHA-256: ab0385c4b8afacca3a81afcd80ac8fba96dedefffcb290ba94123c5931628dee

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