Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b14cc3e3277a3e…

MALICIOUS

PDF

74.8 KB Created: 2021-09-10 06:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4c176aee3616f8c81a4aff5b248c056c SHA-1: 9ca95cc63e6b4cc737888ab14c6ed47648a7bd07 SHA-256: d0b14cc3e3277a3e9e1c481498baa9258d094b46d10130f6c74ab194dc0f4134
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://ketchas.ru/uplcv?utm_term=how+to+spoof+on+pokemon+go+2020 PDF link annotation
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/jipenobejuwatakixeged.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/34907296352.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/tatanefo.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/93366046032.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/22173197799.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/xarawedumikiw.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/sasoxeputibuk.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/vipovifazedodiduri.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/varopepu.pdfIn PDF document text
    • http://fourfoods.com/images/files/13685846631.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/jujazovetabixirox.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/lapajojiru.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/94877241399.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///40665122612.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/2608071185.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/47781022113.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318018d2d66---18050550163.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/21112172208.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/56880363636.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210902113204749.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/pevedidokazok.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133c8ac6e6c1---tibolenedagunaboxedoru.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_off0000be26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE26 10712 bytes
SHA-256: a3a833e6a2c2c6d55aa0e8ed3943854fa97d01ee5bed30d6b6ea851648d82deb
font_01_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 17968 bytes
SHA-256: 11a7cc065ad9c1f1d438c572ab828c9a19a4fa6ba2b96faa4ac6fd2435b84292

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