Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bdeef82027d456…

MALICIOUS

PDF

74.7 KB Created: 2021-10-03 18:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bc2b3c619ecfadbfe7a808d7af2b67d5 SHA-1: 83d11966468ffbb3492db1a0cf7d9f63e6ab1da4 SHA-256: 07bdeef82027d456ca6c4696a2c0d858cb2c7c6d30678923e0220e18db745a6b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://danchrisjewelry.com/userfiles/file/lefuxowufevugepipomu.pdf In PDF document text
    • http://apart1day.ru/file/55056273510.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/49343351425.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jitejenafimimadenuwiguwaf.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/kipaxi.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/wasejubiwokowanisofinipon.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/33285569281.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/49051181466.pdfIn PDF document text
    • http://cycling-software.com/files/file/mitalazawijasuxevusavuro.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/jesoropogunus.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109131736519876.pdfIn PDF document text
    • http://imoroz.by/upload/file/bepireguronamatugaj.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/18649315095.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6d12fa6eca2b5594343e1070d37b4e57/panuxejebuwomaw.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/dopuraxisarifaweligosu.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/72895815266.pdfIn PDF document text
    • https://chilepools.com/contents/files/pinifotirerovofop.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/e3s7um5milsr68uk0p8f2ngjbu/2624946049.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/56855242786.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/11788794244.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1631322203.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/80224975587.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/pagosebalisuga.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/68367068707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=joseph+niles+and+the+consolersPDF 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_off0000b933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB933 10604 bytes
SHA-256: b3917dc780f26d29e6dcdd09b84219c058e001eade1e9adc0a06c16514d72693
font_01_sfnt_off0000d15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 19448 bytes
SHA-256: eaec64eafc2e5e53244f7865b593b0f93a91a52bf0a60bb79171769073fda9e9