Malicious PDF — malware analysis report

Static analysis result for SHA-256 6156612895f4e90a…

MALICIOUS

PDF

76.7 KB Created: 2021-03-27 19:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1bdd3a1eba4e1c55230d80c94e80b014 SHA-1: 0dfd76af7b1a5940de2f519a3b046d5692b182e2 SHA-256: 6156612895f4e90a5eb968add04aa7f99f49a85cd6eec3ca5218800f0ce39c6e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a high likelihood of malicious intent. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure to phishing or malware distribution sites. No scripts were extracted, but the presence of many external URIs points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://leonvi.ru/123?utm_term=zerodha+varsity+module+1+pdf PDF link annotation
    • https://cdn.sqhk.co/ninivaxibab/difjbgc/android_box_google_play_services_has_stopped.pdfIn PDF document text
    • http://biteroz.iblogger.org/71975177208.pdfIn PDF document text
    • http://nesobaka9.xyz/ursa_mini_pro_user_manualtagg9.pdfIn PDF document text
    • http://winoraama.space/13998440357zckby.pdfIn PDF document text
    • http://argo-tourism.com/46841388045ybbcb.pdfIn PDF document text
    • https://cdn.sqhk.co/berazanoga/oijifr0/train_racing_3d_game_download_apk.pdfIn PDF document text
    • http://manoligixave.66ghz.com/kdrama_baby_faced_beauty.pdfIn PDF document text
    • http://banoduber.iblogger.org/nirudozewokegufi.pdfIn PDF document text
    • http://winfreeiphone.xyz/2017_ford_gt500nhy6l.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/cXJ3pjj/memes_wars_game.pdfIn PDF document text
    • http://rutakaganutidu.22web.org/at_t_u_verse_tv_guide.pdfIn PDF document text
    • http://ketorebagibof.22web.org/dodawo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://widuxetikos.epizy.com/wugitilanetuvisotizamu.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/65938439133.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/66461039434.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/34411100945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d154b43-eb01-45d9-9cf6-f3fa3bcca628/bose_cinemate_remote_codes_xfinity.pdfIn PDF document text
    • http://tujefuguxofela.rf.gd/17936242114.pdfIn PDF document text
    • http://pupudewasoxo.epizy.com/kixodofuwuvopirasovoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c0cf6b-fa79-497f-b1cd-505b612def07/85494484753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda5228f-69ee-42f5-a481-a31c885da7e5/dodge_ram_aftermarket_body_parts.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE09 5452 bytes
SHA-256: 2eacd98eba2841c45a5be0fa53c805b57d6967b00d541cd3281a55bcef357dae
font_01_sfnt_off0000e081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE081 10520 bytes
SHA-256: 244b5185b5590c0f628a07e24a3d715b9b47ae8006111f83d453e1995ec612de
font_02_sfnt_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_03_sfnt_off00011a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0C 2752 bytes
SHA-256: e68b24175d5971d76b4c28d2c0db5c95ec99c51429de742704ab5baffc55f2f0

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