Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fc33fdc753819e…

MALICIOUS

PDF

88.2 KB Created: 2021-09-09 15:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2828cdfbfcd4ff85437701d0eaac3185 SHA-1: e9a3c2cb71a7786380902afeeab613c46c066c88 SHA-256: 20fc33fdc753819e7bf26f1eef857c9c1766301e3a4270ef5537507143a28e40
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links, likely for phishing or distributing malware. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://goldenmallbiotech.com/upload/files/nenevutur.pdf In PDF document text
    • http://cecev.com/stockages/files/54475754649.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/gajazibibewetipigujezixif.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/49781060182.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/91378728464.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/gigalibid.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/zatanifadubejesisukikes.pdfIn PDF document text
    • http://floramarble.com/uploads/94091945172.pdfIn PDF document text
    • http://congluc.com/upload/files/63936340352.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/kasubax.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f13ca2ef0a---98107412504.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/69813470330.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/savolunetutej.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/ginozikawotekogel.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/99738440218.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/xediro.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/zekudemefivu.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/20017529045.pdfIn PDF document text
    • http://les-dvorik.ru/userfiles/file/farezuxuwogedi.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/51263459032.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109031717521712.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16308195521343040538.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/17089407690.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/tuzilur.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-9/20210909172005967086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=calculate+moles+given+molarity+and+volumePDF 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_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 19280 bytes
SHA-256: 33d6d230c984b37cfd736f35b18899124e3ac35f22742fbcf4121f015b721986
font_01_sfnt_off0001219c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B3 11024 bytes
SHA-256: 527bfae7c9a910701f9b017a1f715dc716d12ee3c8a470b9094f77e0d4ccdc0b

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