Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52adf32625414dc…

MALICIOUS

PDF

78.5 KB Created: 2021-06-11 14:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7efdbcc62a8d2ca089860567db92758c SHA-1: 9f3dde06d98d1f7abea8647587028a721d31be19 SHA-256: c52adf32625414dc0cf20bc4cabc6f9b39bcca0fb36c5f94b14c2012fcb033f7
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://wastran.ru/pbw?utm_term=to+the+beautiful+you+subtitle+indonesia PDF link annotation
    • https://pezofonarumupub.weebly.com/uploads/1/3/5/3/135396673/7f2a2e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_6037ea9f50c4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495858/normal_5fe23038562ef.pdfIn PDF document text
    • https://kikipaniwuno.weebly.com/uploads/1/3/4/7/134714830/7052409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_602678c954009.pdfIn PDF document text
    • https://debamivuk.weebly.com/uploads/1/3/1/8/131871977/pimuzi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fde61faf2c71.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/dumumazafirizikuka.pdfIn PDF document text
    • https://lakiregatu.weebly.com/uploads/1/3/4/5/134589313/rokipa_tetugejo_fulafikav.pdfIn PDF document text
    • https://zudobusida.weebly.com/uploads/1/3/5/3/135330479/6bbb5c9e21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_6006ecd8aea68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144575553/11461111764.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/atoms_elements_and_molecules_task_cards_answer_key.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144424776/what_does_retroarch_emulate.pdfIn PDF document text
    • http://tojasakamu.pbworks.com/f/what_does_beaded_bracelets_mean.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/f/33356281204.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/36147872550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c14508-db28-4511-93c0-7df019b04eec/fufajakagakifasokinapu.pdfIn PDF document text
    • http://gudikijuruf.pbworks.com/w/file/fetch/144802575/honeywell_t6_pro_smart_thermostat_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29673e49-1440-4411-aac1-3929912ae271/memibigetapub.pdfIn PDF document text
    • http://vonodatob.pbworks.com/w/file/fetch/145081164/download_crash_team_racing_for_pc.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/91587205795.pdfIn PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144447054/91935064531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ac7d9a-e13b-4e44-a01e-7b0e1320f2e2/vofupavenefojutag.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 3840 bytes
SHA-256: 103849aaf72a52e1cbc3467caa9924c70c0ecc66084ad2fd36d36af69bcc9332
font_01_sfnt_off0000f784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF784 5092 bytes
SHA-256: bd29bb107f99cf0246ab18b01dc0b44e3310718334240f8fffbc62a2930d5598
font_02_sfnt_off000108dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DD 10164 bytes
SHA-256: 71f90f62dd0db15147e0ff85cbcdd35045e49bd476524ec0469211a3995e01ae