Malicious PDF — malware analysis report

Static analysis result for SHA-256 b149c7068d1b38bd…

MALICIOUS

PDF

72.9 KB Created: 2021-09-22 21:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d69f5b8ee1db0340caab8fc0720abeba SHA-1: 90494e838c38be951e15b4c8af142f1925e76233 SHA-256: b149c7068d1b38bdb960feebe2a7c585121746a2f2bb2ec0d9a712dfc6952449
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://ketchas.ru/uplcv?utm_term=how+to+put+your+own+ringtone+on+whatsapp PDF link annotation
    • https://spandoekland.nl/userfiles/file/fabegujifo.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/4a39pajl579f9r57jpoo1djonk/60601334821.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/83094167070.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/38593324504.pdfIn PDF document text
    • http://organizeteknik.com/userfiles/file/17536148270.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/334767b92dbc0ceaf33f3e602ae07886/dosawebubimatugoxapamel.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/nemuzalaxadom.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b8573dba0---tesujotoxenonuwororapejin.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/zuvosutelusirijin.pdfIn PDF document text
    • http://falconltd.pl/cache/file/gosetepetosowif.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/lanoxiwu.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/dilofinebenikexojas.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/61135720141.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/birofavus.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/88fa0c96ea7a780917323fe595087fe8/latelegaxewenojebew.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/vusatabiv.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffa77723fa---16140409528.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/32037286337.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/75736676290.pdfIn PDF document text
    • http://gestioniarmatoriali.it/gokujapikisotelugojesoja.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/dofuduvefewavofovujijubo.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/13684322443.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/dafavunuduwilunun.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/f5cbc674f9a4976aabeaafc332738197/nomomotolozijuwojosune.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/329ca1468b464ab30c32e178bfbe4ba7/pufanemunonagexowixevubod.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/34428404973.pdfIn PDF document text
    • 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_off0000bc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC62 15748 bytes
SHA-256: 676ed5463cbb2a6379bc6fd1f36567ee5c6911f60a28307e3d47f73d7674505d
font_01_sfnt_off0000e489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE489 10776 bytes
SHA-256: 74c9aed7610289732fcb60ecca632f475013b101064cc623e76092348d633a98
font_02_sfnt_off0000fd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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