Malicious PDF — malware analysis report

Static analysis result for SHA-256 da17c34a4678eb8c…

MALICIOUS

PDF

76.6 KB Created: 2021-09-10 02:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 48d97bdeb5da982187b6c4a97f733a8c SHA-1: 92a01f9a1e09efbb10224247b0464309bbd42cda SHA-256: da17c34a4678eb8c69ce59d311eed5f6b5f72398ccaf1c0d78067498ccabb51e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/uplcv?utm_term=flight+787+advanced+apk+mod PDF link annotation
    • http://www.nachtruhe.info/up/files/soruvas.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/126f61b7e933389e8b522c63453885ae/49776982959.pdfIn PDF document text
    • http://lulanjina.net/upload/files/vukaresijobewazuv.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130af2e4428d---64276562121.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/59881444170.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/siwexorebi.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/13916176096.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/92265186087.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/gawom.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/61600184664.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/manemoj.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/rasanekisifawumubewowob.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/67336126656.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/75263805075.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/95626706159.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/gobikoruditivon.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/6165897194.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42968993596.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/vaposudedusibopurofukep.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/63709643796.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/gedevemetepisarosulufeb.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/62451682149.pdfIn PDF document text
    • http://bolt-go77.com/fckeditor/userfiles/file/13896693870.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/80960922870.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

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_off0000c1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 19308 bytes
SHA-256: f5997e45fcef7ff26e1679cd4a56024347ab399cad695cb3f85a958e56cc4347
font_02_sfnt_off00010bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB5 11088 bytes
SHA-256: f80ee2501b573bb9b7224a2a74fcd2a0662d8a2bed784d36a418787254a18cc8

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