Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f62f875c19bab6…

MALICIOUS

PDF

79.5 KB Created: 2021-09-19 11:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ed21e734f68ff2a4c97b9522e8b1736b SHA-1: c0607ffa8794ebba7dee6a99ff7b23a8043967a0 SHA-256: 70f62f875c19bab66b51ce6a55c1848278345abcc118f63df977d22f5b601c95
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or are part of a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment, likely leading to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161456179d8bd5---puziluzivumugibosopon.pdf In PDF document text
    • https://thefertilizergranulator.com/d/files/tixefanimuko.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/mepetijes.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/lawopasugaf.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/91233872587.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/94950792451.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/jojudegamubajurubajolux.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/14/file/43202328138.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/zufomapetalotepiwiwugi.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/bivixef.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/fuxenivewuz.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210913035524.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/motodorogabupuvuteser.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/xomenuji.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/54912398602.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/niranubutigunipesikadop.pdfIn PDF document text
    • https://razredna-nastava.net/files/temariboxaxa.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/68193158214.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/88419682385.pdfIn PDF document text
    • https://pkmoscow.ru/ckfinder/userfiles/files/sajukotosetobirupufapiz.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc39616ca1---xaroperokixakavanif.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/96898571873.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/91633480890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=y8com+3+playerPDF link annotation
    • 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_off0000d5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CC 16492 bytes
SHA-256: e9c35dddb0b389bf8560bf87eac8ef752b0a11dc8046c0bad9939648b6435661
font_01_sfnt_off000100d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 10552 bytes
SHA-256: 0b6c440e6d799ed0a8ed21b1c231468f57741ecd4b8751e5ea0f1e7ae90a3eb5
font_02_sfnt_off000118f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1