Malicious PDF — malware analysis report

Static analysis result for SHA-256 606bcded841422aa…

MALICIOUS

PDF

109.8 KB Created: 2021-06-21 11:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ccc0cdf7c937d4fc24522fcb8960e1eb SHA-1: 269ab791466f846763344fe355e720e4f744ee3f SHA-256: 606bcded841422aaf34f7ab96cb85bac871f283b29a137342d6d017501e913a4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. 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 numerous unknown URLs further supports this phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40ebc4b6ac---libibusalovewusu.pdf In PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb26f1673a---50996370811.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/nibujatosarefowadugu.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/bujigunidemezezufazoju.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/6gant5ctio0j6mkjsg9mgpbic2/pelevilidob.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/fegozifuromunuk.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9acf20e48---26521128535.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/fepesagavanunakirufu.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/g389ib2q7ukc3ue7imu3ng6f2p/jemikivusenekekupi.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/29402093995.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e405d08bf---bifudozojemeku.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/6c4e23296d8e42aff3fe023131478a10/34801658960.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/16358271367.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce30bb4cbcc---tigid.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/r29nig0hqu8jl5269rnil3cfr2/vamul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=naruto+voltage+apkPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 39368 bytes
SHA-256: fbe5baee809b13588daff829b35eea0df048137985911acb5df5fd3fa2dc5771
font_01_sfnt_off00015b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B67 4900 bytes
SHA-256: c2cb70f67cfd50fbcaefb732843f7342035c8a86e576f11e91f049f39d1e299d
font_02_sfnt_off00016c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C35 11200 bytes
SHA-256: 75be4c42a2de434a24c83d40c760d62408e6e030ae0e07482c47784ace758e84
font_03_sfnt_off000192ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192CA 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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