Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d29af5baafdad2d…

MALICIOUS

PDF

84.3 KB Created: 2021-09-20 00:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 414d8cbe01e55147b4d44136750c4737 SHA-1: 284c138a0aa3163ba02b52d3bfa233510b1e7a29 SHA-256: 6d29af5baafdad2db22782efc474da5ebced5a83b671c5ebe6547b27fef2eff7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially malicious content, likely as a first stage for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://catamma.ru/uplcv?utm_term=how+to+install+pixel+experience+rom PDF link annotation
    • https://maintogelonline2.org/contents/files/96276551519.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338a5957c41---luvaxagobujugigofi.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/030137183383.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/35112207773.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/gutigukufafu.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/61155652048.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/52833729124.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/43185560940.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/16790693877.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/xegilebebijim.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/weronivegudaxojukaxuvu.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/neziniraw.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/dufasejoxomafonupituruwa.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/josupubeziba.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/vamiwez.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/328465782.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/649174da0d2a9bb89e4436223a8da231/44149539862.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/97956012138.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/kidibozipulomufele.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/6658450969.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/tiwusoker.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/73166685228.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/womoduzepedasofikinipenax.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/81040882765.pdfIn PDF document text
    • http://safarang.com/basefile/files/widikakitiwilutazes.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/toborelawazobizumavu.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_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 18260 bytes
SHA-256: 920a1f06446604c370ce61e260a41db95f0d8fcddbe90dd6685839cae131afc9
font_01_sfnt_off0001126f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126F 10712 bytes
SHA-256: 97b329fe83b636f4e5ead5a0880f3448b3a17e82ad8da24a959e9f16bb729f51
font_02_sfnt_off00012b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1