Malicious PDF — malware analysis report

Static analysis result for SHA-256 43dd3d13124abbcb…

MALICIOUS

PDF

70.9 KB Created: 2021-01-30 13:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 76aa1f7d3821ec8d99074850c85891d6 SHA-1: eeb7c75442d5f70a6405fd830a18498f306603dc SHA-256: 43dd3d13124abbcbca21901b3641d2e96c0ffb2a440a92e7b31609fa73499130
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a link farm on disposable hosting, pointing towards phishing or malware distribution. The presence of embedded URLs and the overall detection score strongly suggest this PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/aws?utm_term=whatsapp++karna+hai+video PDF link annotation
    • http://gojepifega.22web.org/varupuxikasaraze.pdfIn PDF document text
    • http://livecopyrightverification.com/kick_film_heroine_name_and_photos0hcq1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fee47f157ebf.pdfIn PDF document text
    • http://penaleduduzib.iblogger.org/belle_princess_coloring_page.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_5fe8d01ca360d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495558/normal_5fd8e0a3e8be0.pdfIn PDF document text
    • http://shop-kid-toys.online/cod_world_at_war_zombies_cheats_ps3wp63r.pdfIn PDF document text
    • http://fivabigenarewo.22web.org/in_my_room_song.pdfIn PDF document text
    • http://vejawezodasupax.22web.org/7196439801.pdfIn PDF document text
    • http://cmb-societe.com/85162569531ne3ds.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fcfe66fbe41f.pdfIn PDF document text
    • http://instapriz365.site/school_days_female_characters5q7qt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lenadupubop.rf.gd/smart_audiobook_player_free.pdfIn PDF document text
    • http://fufibilola.epizy.com/fepugej.pdfIn PDF document text
    • http://luremugaxufarup.epizy.com/lightworks_video_editor_gratis.pdfIn PDF document text
    • http://regipikiwubadov.epizy.com/batman_arkham_origins_apk_mod_obb.pdfIn PDF document text
    • http://mudozegiviw.epizy.com/digital_inclusion_scale_template.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_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 5152 bytes
SHA-256: 123f115b0a100086d19a580f68c53416b8ad0d0ff7cb6c4b07e1fe893357e1b1
font_01_sfnt_off0000eb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6F 10332 bytes
SHA-256: 1b8b074ea23f6fc72150270c3e15b9686c2bd383d0c6609a5e52a8659eca24aa

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