Malicious PDF — malware analysis report

Static analysis result for SHA-256 a018d53977d2d1b7…

MALICIOUS

PDF

77.4 KB Created: 2021-03-29 09:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 15ce0e0cb4933a4b4d7804b7cb7c1a6f SHA-1: 31bddae185b8425ac3823a97478e095c30b18d1c SHA-256: a018d53977d2d1b7543d6a7a3bda986f98f8adb0252c30119cda2c8b78a6b557
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content hosted on external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=catalogue+marjane+fevrier+2020+pdf PDF link annotation
    • http://waystep.site/tascam_cd-rw900mkii_cd_recorder_playermqhsd.pdfIn PDF document text
    • http://idealicaufficiale.website/animated_gif_icontbi04.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/call_of_cthulhu_rpg_wiki73cro.pdfIn PDF document text
    • http://inmyshtangen.xyz/21203926189owvg6.pdfIn PDF document text
    • http://arenaprobet.com/anomalies_placentaires3d9mz.pdfIn PDF document text
    • http://siteznakomstv69.space/brigandine_ppsspp_androidf1jq8.pdfIn PDF document text
    • http://runmasten.online/29577913741devrl.pdfIn PDF document text
    • http://manybigs.space/mebidigimurxtoad.pdfIn PDF document text
    • https://nemanuvipiza.weebly.com/uploads/1/3/1/3/131398236/sizajofugemazelo.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/givujot_gegej.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/nordictrack_c2300_treadmill_manual.pdfIn PDF document text
    • http://vittorguxx.site/76795395474jawnf.pdfIn PDF document text
    • http://nefritthebestthing.site/26469403283wyisd.pdfIn PDF document text
    • http://usmileofficial.site/462536443569sd78.pdfIn PDF document text
    • http://natorg.fun/digidesign_mbox_2_mini_how_to_turn_onyso7d.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/69928972919.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nowokil/3d_printer_file_format_stl.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/rafopoxazefil.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/ipcc_report_2014.pdfIn PDF document text
    • http://sefokirof.onlinewebshop.net/gupopekiwivu.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010c64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C64 18128 bytes
SHA-256: 315690458d00aeee07b01700654fd79fcab726113c6f8ebef8bfc5acb9961629
font_00_sfnt_off0000d476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD476 5496 bytes
SHA-256: 69ec2002440ff64e732d9e81bf4d2e3dff7e731e18c3edd74a3159cb37319aac
font_01_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 11160 bytes
SHA-256: 8ad9e076b2bdcc3b8bf8706212e14858b67e3039cbc38dce1e040b69eff6f352

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