Malicious PDF — malware analysis report

Static analysis result for SHA-256 9429d6911364150c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-11 03:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dfca506dcc401efece665b757e2f6f96 SHA-1: 82beb80e0403bf6694050ca25e9f4c8edc061544 SHA-256: 9429d6911364150c40b27845f7310c5d98fda19cc9d190c97e2618ea92e9022b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on potentially compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to exploit users via redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://df-2.de/images/daten/file/gemisita.pdf In PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/46333081693.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/40495483568.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/d9f9cfb8bd0bb9b7922f91a6ae645e8e/warurozomuwugepe.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/roref.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/tuguvix.pdfIn PDF document text
    • http://eunlocker.com/Images/Editor/file/10563389623.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/rerozigoranuzodejulif.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/39646906327.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/97902639952.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3be3b5924---50816583211.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/zanijup.pdfIn PDF document text
    • http://jinyezi.cn/upload/16789084822.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/7419987741.pdfIn PDF document text
    • http://j1ent.com/userfiles/file/20210911002754.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/1470669703.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/dv55urnbbljjdjn49u79jq30i0/93966153625.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/fozonosol.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/99842967656.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/vozutodifepurutesijidepiz.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/zugalak.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/xemeripe.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/71557687616.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/bazelawuvunisote.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/nibisotumugogiv.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/624311608.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/xupevepawaziv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=prem+ratan+dhan+payo+full+movie+download+720p+openloadPDF 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_off0000da5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 11252 bytes
SHA-256: 7d21b84265b98939e06590e967c4f8e4d6db5cb056f55cb91fd1f0a7088fd60a
font_02_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 18648 bytes
SHA-256: 07253720541a57feb2acda4544fd752cae4aad1f310a151810fc5404bac52eb1