Malicious PDF — malware analysis report

Static analysis result for SHA-256 486de196f234d5c8…

MALICIOUS

PDF

72.6 KB Created: 2021-09-24 23:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fd2d5f4c8e25bf905060002ba5364d4e SHA-1: eaf64e810633d3af53248e3e719aeef8cf74289e SHA-256: 486de196f234d5c8f8173e8501d4b5f708dec6dc39a45766e95b04e19f22d1da
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is a link farm designed to obscure malicious content. The 'Password-protected archive handoff' heuristic suggests the document's purpose is to trick users into downloading an encrypted payload, likely after providing a password within the document itself. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/238fae77e8868f6cbb38e9c6bf5ed491/gokavuwamusewawoti.pdf In PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/96261243786.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/togijuviratizigiwor.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/75096914021.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210909201232.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/33429741447.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/sivenasuludar.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/82907555205.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/97781422003.pdfIn PDF document text
    • https://hoya.mobioptika.hr/UserFiles/file/fakisikurigigubizijuma.pdfIn PDF document text
    • https://kar360.com/resimler/files/32651969364.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/bozexopofoganoku.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/29997440421.pdfIn PDF document text
    • http://proxima-design.cz/files/file/sesitaxuluvol.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/15022768325.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090102464263.pdfIn PDF document text
    • https://deverfgrossiercms.deindrukdemo.nl/upload/files/84233712251.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/nenadutofumikakexux.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/82419497245.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/jekajidusikekivafawevomit.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/15268551041.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/27669923981.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/susimegukisega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=hotmail+sigin+inPDF 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_off0000b8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BD 17660 bytes
SHA-256: 93d88fa75d0f752ab0dfbb989d34f648579893e7f17dfb33e0404e5355e9a62d
font_01_sfnt_off0000e62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 10212 bytes
SHA-256: 1571c08e7ef3810cc51fe048942a2b3619deb5d9a83280be4950a93a6f9a7112