Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e93e057f9a4014…

MALICIOUS

PDF

109.6 KB Created: 2021-07-06 16:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3820927f83592787ff2671db3e48a16d SHA-1: b7606bf7f7ae71312b6520ef5b0925775dceda1d SHA-256: 07e93e057f9a40145961e8d9fb4ffc7e31c44a8cb9c34eac0307cc055c57ce8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The document body is heavily obfuscated and unreadable, suggesting it's designed to conceal its malicious intent rather than convey information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://vishalahospitality.com/ckfinder/userfiles/files/95630311816.pdf In PDF document text
    • http://anatolianlgs.com/userfiles/file/37187362329.pdfIn PDF document text
    • https://agatanorek.com/files/file/xefemirojepogoboborobir.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/73e52d81415fe32fefb290305fc02744/bevadanax.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc8ef89838---tonimawonofatu.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e8e4c72322688b9dc10898d67df2d960/79261157972.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607064fc29e14---fewuvijidisenitonir.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/33lde5d6rldau5o0858mgq1b4s/76601993539.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cc00100ab---batixosokaravufupisug.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/nivin.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3e2089f21---40508774483.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1182a640e---55611435485.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/6e76dc5fefa03c9202174f8d91b863b0/zazevorodasax.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/01aa1dfbc8e751a70664bec90f3c1442/wedolamukovazokawusapez.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/papakuni.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/zevekatofulame.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/1864c3744b3255779401823b680350ab/nivanuzijujo.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbc5b6d57---73061975323.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a64fc542edc---58578365845.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/pukifevefodap.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/xadutizodi.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/8bm9t0s3m23dc1cheuhi2rd7n8/jinasetiwebes.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/940cfcd157040a56c3ab9433e39c622f/wilaraliteb.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ae5bd3e52---zinosi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+old+was+wiz+khalifa+when+he+started+rappingPDF 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_off000147da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DA 18080 bytes
SHA-256: b9171f04e6b8240ee57a7fd8a2568597af67a0244bbdcceeb6756996265b3a2c
font_01_sfnt_off00017796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17796 11008 bytes
SHA-256: 103199c9e7c18e857c980d0838ffdddfde21606bdf5e51547626b93cb2f5eb41
font_02_sfnt_off000190e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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