Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d2c7383ec29fd0…

MALICIOUS

PDF

70.8 KB Created: 2021-02-06 22:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e7ad3b7a9558c4d99f3c4170c5650eab SHA-1: cd4159a771443052ee4ded62b980d529a90446a3 SHA-256: e8d2c7383ec29fd013166a01c6776707803fecb0f3513158da208d4e10e1595e
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-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://maypoin.ru/123?utm_term=opticover+wifi+repeater+reset PDF link annotation
    • https://cdn.sqhk.co/rodesedaded/AFK61jf/46747506868.pdfIn PDF document text
    • http://vojituvidur.iblogger.org/suduriroj.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/f1vibjj/use_feistiness_in_a_sentence.pdfIn PDF document text
    • http://kernig.pro/liwuragapuzoradifeganyxljf.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/kjajbbU/wedding_cake_makers_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/xijodepub/cgj79gj/bagebiwomegoxataremuj.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/cjja0ig/vobosapajaxiv.pdfIn PDF document text
    • http://winoorama.website/pikimusiveborilepoh9615.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/LtZhhpn/mods_for_minecraft_pe_android_oyun_club.pdfIn PDF document text
    • http://gasufulezexe.22web.org/85197103451.pdfIn PDF document text
    • https://cdn.sqhk.co/woferomot/jcjfpgj/chatous_3._9._85_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sunemixawuvija.epizy.com/97830156127.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/hotstar_app_for_pc_without_bluestacks.pdfIn PDF document text
    • http://nofulevar.epizy.com/dungeon_world_fighter_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/bubble_shooter_2019_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/wedding_tent_card_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/febogaxopebimel.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_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 5156 bytes
SHA-256: b186d3df1776913fb67b9575c3ea3485d4f4f7ad1c8c3d53c74942a42cc25df2
font_01_sfnt_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 10672 bytes
SHA-256: ca9318305bf4136937a4b51493aab2f9d03656f1086510a8c78a7203bf3aa298

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