Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c74251064b5fb74…

MALICIOUS

PDF

87.4 KB Created: 2021-09-20 03:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 302b5497fdd3997a790091d6b430f7cc SHA-1: b7372821d972c9b730eda7b0dbe74c75a96b2c82 SHA-256: 7c74251064b5fb74a41c059560f4d919d568976f3ae002590f6c75c560243427
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://infrive.ru/uplcv?utm_term=fast+and+furious+8+full+movie+in+telugu+download PDF link annotation
    • http://simoncaulkin.com/images/3854690453.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/9248497003.pdfIn PDF document text
    • http://tion.hu/upload/file/69837483304.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/12243438952.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/45787165938.pdfIn PDF document text
    • https://gangnampools.com/contents/files/kazabejudoxulosirede.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/42932203731.pdfIn PDF document text
    • https://ewt.cz/res/file/26095266856.pdfIn PDF document text
    • https://datawire.gr/files/files/kutiregizusukuferiw.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161430b60eb6c7---narosiliwimezipimonufol.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/mogozafuturagime.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/58541928367.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/71634721077.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/60641906715.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c84a1abc7---xemamitud.pdfIn PDF document text
    • http://chieucoingason.vn/files/92198448216.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/7414851557.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/86297856176.pdfIn PDF document text
    • https://armenia4d.com/contents/files/lisabobabitasufasukexer.pdfIn PDF document text
    • https://tele-video.ru/upload/files/42451676485.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5425557255.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/11478824399.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/turojube.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/64230594336.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/mapukemobubutogegos.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/gitamubamom.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_off0000ec0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0A 19096 bytes
SHA-256: c01d57b1bea8868b8ffb8400ca0c281af3c7770780d8cb14da688b6541824120
font_01_sfnt_off00011daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C1 11136 bytes
SHA-256: 4b53e96c5f53eed487af5250271ab038a9de5157c59700706e28bbc670df2ecd