Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a06e3bd12a6cfad…

MALICIOUS

PDF

76.0 KB Created: 2021-09-21 05:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4078e456928ccd3c8c67d81b08a3ed51 SHA-1: dcb5fd1147ef44f192ea490d7fc7c90004f91622 SHA-256: 1a06e3bd12a6cfad9e87d4fec0cdef40b21a8e7a4139fb4dd555c6fcf23a34ca
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=pokemon+go+spoofing+for+android PDF link annotation
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/gebite.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/ripijidedewowalipekigo.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/66046760764.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/18903621749.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/jopuxivop.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/55538547689.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/2802464342.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/parobogodatibiguw.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/vedilamuguvekupe.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d16c85deff---xewatajifixepap.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/27204524996.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/24619025447.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/darezoxividarafu.pdfIn PDF document text
    • https://ripedzn.com/app/webroot/files/fckeditor/file/sijibumeviweb.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/suwinowegimilufapejuk.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/62481011023.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/nukatiponeligodije.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/61392372449.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/zoxiku.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/67560265132.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/pedezazaseturuluwubab.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/sefufaxomosojupomuz.pdfIn PDF document text
    • http://goldmustang.ru/files/files/kojolepakanidofigup.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_off0000c293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC293 17968 bytes
SHA-256: 2916a7ab182207032c99af340d3e4d27f53e553691134328ce7d24b805cb9ef8
font_01_sfnt_off0000f1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A3 10792 bytes
SHA-256: d8a01abbf2057d0638eb510d3491cc7e178cea3ae4cc25189c8704e6670588db
font_02_sfnt_off00010a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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