Malicious PDF — malware analysis report

Static analysis result for SHA-256 abba25e0a6d14b67…

MALICIOUS

PDF

90.1 KB Created: 2021-08-21 22:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d9d166b2753d0a4234399b24a6ea217f SHA-1: 967b03bbcb03dfc02c37997b34625176e1fb0442 SHA-256: abba25e0a6d14b67ce94436c31d437cf9adb77098b0e8933f17d341450bba08f
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. The presence of numerous links, many pointing to compromised WordPress sites and disposable hosting, strongly suggests a phishing campaign. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document content likely attempts to trick users into believing there are changes to payment or banking instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://archism.ru/uplcv?utm_term=is+free+robux+legal PDF link annotation
    • http://aep-tc.com/cache/fck_files/file/judijobupejev.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/dkds0srgin713b8g48s5q57lp2/rirowoxudosozeniwoned.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/25676160381.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/sakatijuserofutaronoda.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609117573761f---burapiv.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cce0lb6hhja2ba7ss72j4vmjt3/79942417187.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/36614642698.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0v267rg9b47o6slasuto7h7lvr/xozabozinumujupoza.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/90644075723.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///56092638588.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c150ed2c300---kuliju.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/bc00e50703274a0f8664cf4cb1459333/51380285301.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5293ed49a---44154554767.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/jewiv.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1611c98953fcbf---95757565173.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/32976506136.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/sivujowepamajonuja.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/irs7jl487mhad6htb4ebpn8q6e/jixofetipewotomo.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/82227339469.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/c659af29868c9ab890cabefa30989cef/6913202832.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/258244440.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082ded7cf8db---mominimijulovuro.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c6effea97746c31e820990ee892c2538/mifinutom.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_off0000fdb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CF 10388 bytes
SHA-256: 34f2ca5bf52d2507f1efe19967105eebdce5f872279e6879844aa13fbbd7f043
font_02_sfnt_off00012d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7E 17016 bytes
SHA-256: d71d0a48dc274d6a6f6f08c8322787ea3516f2b74f52d7d0211defd140810909

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