Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f16cf4067e7e94…

MALICIOUS

PDF

83.9 KB Created: 2021-03-14 17:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8209db7d46e8afe4ac59a828813f4bc6 SHA-1: 34fd66cabf51027416dbd5beb414f6ac345483f3 SHA-256: 05f16cf4067e7e9461c7bcb833cb13a724d180ff90721f7d45f14e8aed323037
166 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm with numerous external URIs. High-confidence heuristics indicate the presence of invisible links pointing to suspicious domains, such as http://ig-supportcenter.xyz/97732862832if6u7.pdf. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to malicious sites via these deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wix?keyword=mutiny+pirate+game+unblocked PDF link annotation
    • https://cdn.sqhk.co/xororasomig/Zjgo8lb/polutode.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/what_was_the_number_1_song_in_2017qt2ew.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/Wifif8u/mufurimufupoxagavij.pdfIn PDF document text
    • http://gogejevi.iblogger.org/46152083652.pdfIn PDF document text
    • http://tolujupa.22web.org/8203508386.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/hiifhBa/lixuvegeluzawamorugo.pdfIn PDF document text
    • http://complect-tech.ru/64813419112p21bx.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/cbwbhcb/drastic_ds_emulator_pro_mod_apk.pdfIn PDF document text
    • http://ig-supportcenter.xyz/97732862832if6u7.pdfIn PDF document text
    • http://numberoone.xyz/58913670577eofnz.pdfIn PDF document text
    • http://porn77.design/what_is_direct_rule_system0dgao.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/aYVmhhS/lelegavojemefevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dezologukow.rf.gd/opera_mini_browser_for_pc_free.pdfIn PDF document text
    • http://vevenamefod.epizy.com/que_es_la_composicion_en_arte_y_patrimonio.pdfIn PDF document text
    • http://bomapogixojepo.epizy.com/the_trials_of_apollo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebabb2ee-400e-416b-99e8-54f52477ef31/what_states_require_helmets_for_motorcycles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb57dbb7-7224-4fc2-b7c0-d0a7f5fd9fa2/tajaged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618f61e6-cc48-4519-a877-f0dc2f7e5591/how_much_is_hisense_air_conditioner_in_ghana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb57f2cd-dcc6-4286-85dd-405e53b1f5f0/what_is_isentropic_efficiency_of_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a3fddf-bdc5-4a75-ae6a-fc90701ab4ba/how_is_zone_of_proximal_development_used_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44699e0-d149-4fb9-9607-f31baadc86ad/31967887886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe79578-9a7a-4cd7-9a90-c70bf6a6f554/jawakupawo.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_off0000fbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 5408 bytes
SHA-256: baefe51f74005643d927b79514a751d4e12e0351c3ac8ddf4a913d936060f7fc
font_01_sfnt_off00010e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 11344 bytes
SHA-256: bdba323fad80fbe78a65d9f83e40988c6fa4e97d1302c2cd700882848b4f0976
font_02_sfnt_off00013419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13419 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378