Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e662eab6fb9576…

MALICIOUS

PDF

87.3 KB Created: 2021-09-08 18:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f22188f7ba32d7a94a61523740f0d77b SHA-1: 0b834e069e7646ff48ae5a8197c932dfdb629317 SHA-256: 75e662eab6fb95767c9d3e8433056cecbe1a7e48b9273a8cf9ebc3c0bd12e726
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm on disposable hosting, with numerous external URIs pointing to potentially malicious domains. The document body was unreadable, but the PDF structure and URL analysis suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://irlanc.ru/uplcv?utm_term=carbon+steel+chemical+composition+pdf PDF link annotation
    • https://indirimlipin.com/calisma2/files/uploads/81133757447.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/kukoxeruzopabumoze.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/teserin.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/dadenuseruvopubofupamol.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/favawemizutumawifepaj.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/89652078815.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ae11ce2d5---firekuralerit.pdfIn PDF document text
    • https://igraonica.me/userfiles/file/12218922004.pdfIn PDF document text
    • https://happyfun.tw/uploads/files/202109071759253737.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/35865355619.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/jumawevewapodoze.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/40239857223.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/rosanezewolasan.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/55091843588.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/15744592725.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/povinogugubusolixi.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/jaduwolubidov.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/nifem.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/jawetevefakuniligaxo.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/161364d9938769---13051581250.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/50826116150.pdfIn PDF document text
    • https://venus-forever.com/image/files/33558039309.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/42797706073.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/dejane.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_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 19900 bytes
SHA-256: 1c786485a5e2256f8470729843f66689bd1577ee5e4d04b96b4395eefce34cef
font_01_sfnt_off00011e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3C 11056 bytes
SHA-256: ae0973e86f5e42a16769aeddf54daef88528f33273a9bac038cbdf9b08d2f405
font_02_sfnt_off00013794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1