Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cb0dac28bb79da…

MALICIOUS

PDF

67.7 KB Created: 2021-09-25 01:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ddce474813366f679bf360024b90a0aa SHA-1: 6be965c8bb1283189f512e4aee006b1f587c0435 SHA-256: 74cb0dac28bb79daa45cac870a5302dfa43859a763b18a1392bab8c01359cda6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://coretry.ru/uplcv?utm_term=wing+chun+pdf PDF link annotation
    • https://fundreamz.com/ckfinder/userfiles/files/gobuxukarogo.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/kebefuvud.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/xedotodamupejijatuper.pdfIn PDF document text
    • http://ashioke.com/images/library/File/bajupowixorekanebabodizil.pdfIn PDF document text
    • http://paradoxine.com/upload/files/48742436826.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-6/20210906002652821574.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/9383834696.pdfIn PDF document text
    • http://belean.pl/userfiles/file/74833199083.pdfIn PDF document text
    • https://cargobull.cz/res/file/jiteda.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/25446705037.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/porutexekugunemoket.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/52790173575.pdfIn PDF document text
    • http://dsagco.com/Upload/file/87127034066.pdfIn PDF document text
    • https://braus.uz/images/shared/file/rewegolanajofegotojozewax.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/sixarazolovawidebok.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210925013828.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/befifumabomigipij.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33267198116.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/64021202207.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/jigajowibirap.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/38658305655.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a49530550---zerivimevaretoluferoxarib.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/56579285348.pdfIn PDF document text
    • http://pharmabiosolutions.com/filespath/files/20210924130110.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_off0000aefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC714 10168 bytes
SHA-256: 06eea7e2ae3bda146fb2e848ddd6dc6865b26ad046b7696dd3cc1b897d8f4a18
font_02_sfnt_off0000dd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD76 14672 bytes
SHA-256: 9906871f574c955784405b5ce0e8b44c5584a5ea2f4d1ca8fc0e542144aa0949

Open this report in the interactive analyzer, or submit your own file for analysis.