Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa7c4c4c54974fa…

MALICIOUS

PDF

73.5 KB Created: 2021-02-26 23:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 00d7f7da3fbe609ed27494a7d428d795 SHA-1: 9f1928a60267a260566329e8d86f69e97cfe873d SHA-256: 0fa7c4c4c54974faec1d99a33a26b9b1be6ef596d73d1dd93e96a2646f59639c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://xezojetit.ru/123?utm_term=how+to+write+a+performance+review+goals PDF link annotation
    • https://cdn.sqhk.co/jasorevujoxu/DjbCzgc/32299861524.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/jajfIel/tibawenepavedinu.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/23263352385.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/hp_officejet_7510_remove_printhead.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/jgiyfgd/18272487287.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/gigupuA/world_war_heroes_ww2_fps_shooter_games_download.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/14305029612.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/does_1_rep_max_build_muscle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevenubonanez.rf.gd/latimitafixipi.pdfIn PDF document text
    • http://fuxazulofonu.epizy.com/who_is_related_to_abraham_lincoln.pdfIn PDF document text
    • http://vibejasejejake.epizy.com/jibapapekum.pdfIn PDF document text
    • http://bisiboji.rf.gd/35476419581.pdfIn PDF document text
    • http://rukateridexak.rf.gd/free_khasi_funny_video.pdfIn PDF document text
    • http://gizejofak.epizy.com/17411910399.pdfIn PDF document text
    • http://dufeniwa.rf.gd/ala_vaikuntapuramlo_samajavaragamana_lyrics.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/mermaid_invitation_templates_printable.pdfIn PDF document text
    • http://dafiwogi.rf.gd/bobudoteru.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 5448 bytes
SHA-256: dd75852d88566fcd60f90bda02301e93189f78aaa1c488dbfb7bc7cb8980148e
font_01_sfnt_off0000f502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF502 10560 bytes
SHA-256: 8329bd449d30e0565b9036a84e2293b89d9d9a27e68a498d9e63f052bebc50da

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