Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6167de48420b47…

MALICIOUS

PDF

77.8 KB Created: 2021-09-18 06:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e2aa2f9bc9574dbda579d89525d96b3e SHA-1: 8cdc3727fa17242911bb6d898f15ca0bb5a71172 SHA-256: ab6167de48420b47b948d12972947fb1828ef8586620a07039c59c7d29099646
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one with a 'download movie maker' term, suggests a phishing or malware distribution lure. The PDF structure and embedded links point towards a tactic of directing users to external, potentially malicious, websites.

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://philabc.ru/uplcv?utm_term=download+movie+maker+windows+10 PDF link annotation
    • https://dalycity.com/wysiwygfiles/file/xukew.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/perovojavogururakif.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/8ed955832608d4581bfa896b48d4c6fa/pafoganusatumekatevisewof.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/tupudavo.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/85146502947.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/manusojirovevodejowulem.pdfIn PDF document text
    • http://recviem.ru/img/upload/sexiwaxobobawiwolukewi.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/durebuxebakowopijazijove.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/25711393412.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/61524558258.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/givosezojazowi.pdfIn PDF document text
    • http://keacg.com/upload/files/tojutotemoniwaru.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/9224688471.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/duvojegubajenodefonabi.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/52571404530.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/siwosetuxib.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410dd422e8d---gowijederuxuzopo.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/61449630629.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/14274637455.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/nevogixib.pdfIn PDF document text
    • http://elpijisystem.com/file/66218821058.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/87598365308.pdfIn PDF document text
    • http://hongdacable.com/d/files/29672586726.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/wubavikolizeb.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_off0000cf3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 10732 bytes
SHA-256: 466c2cb15cd7d8c0d73b60d09fc566bcd35fd77ff5d0b11a3f84f14e176d7250
font_02_sfnt_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 16168 bytes
SHA-256: a9ecb90c3dc4eaf3908d8ba98817d61e1272f50e495f546b35ca0c8fe73dfc75