Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3de69d5864efe49…

MALICIOUS

PDF

84.1 KB Created: 2021-04-08 08:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 80383624fc2442548cdcd99ea1b807ce SHA-1: 5df00c9911c17c4c17db5ba56e592ff50585a9ef SHA-256: b3de69d5864efe491890631e79075ba6b25ca6bb836a0ee1651f80c6e39ca6ee
166 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, including one pointing to a cracked software download, and is flagged by a machine learning classifier as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely attempts to trick the user into decrypting a password-protected archive, a common tactic for evading gateway security. The presence of numerous links on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=free++coreldraw+for+mac+with+crack PDF link annotation
    • https://cdn.sqhk.co/woragumokewi/hcKeCge/ghost_riders_in_the_sky_chords_blues_brothers.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/d6zjigf/92354499748.pdfIn PDF document text
    • http://tikixoji.mywebcommunity.org/california_dmv_tests.pdfIn PDF document text
    • http://womuvizitina.mywebcommunity.org/26957778775.pdfIn PDF document text
    • https://cdn.sqhk.co/negolura/Bjhgige/79179819116.pdfIn PDF document text
    • http://pe50off.pro/how_to_replace_liftmaster_remote_batteryrj8pd.pdfIn PDF document text
    • http://avlto.best/993221139818072b.pdfIn PDF document text
    • https://cdn.sqhk.co/bojodunaluko/idKKl0K/ten_million_zero_walkthrough.pdfIn PDF document text
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/4887488e53431.pdfIn PDF document text
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/nemubuf_fepijex.pdfIn PDF document text
    • http://keepmaxi.space/webafogezevugapotidaniqf8yh.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/4hhegdQ/gakezewisukepifevubete.pdfIn PDF document text
    • http://cesaregaspari.com/nobuzuxujokat0oo5z.pdfIn PDF document text
    • http://lienforkid.com/fufujusilazuxekulembcqec.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/76787646209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/citizen_calibre_8700_gold.pdfIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_b4b4b66931a94d359ac7a0bd995a699a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/brother_dcp-l2540dw_driver_is_unavailable.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/social_media_marketing_tuten_solomon.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/sizozevoviniwiwaburebeb.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/street_fighter_4_pc_softonic.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/download_1001_arabian_nights.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/dwarf_fortress_steam_release_date_2021.pdfIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_0f74d6fbe6ec4f7badd0229fa4cbcbf8.pdf?index=trueIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_c528ab692db746719f4b69138e1f0f57.pdf?index=trueIn 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_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 5196 bytes
SHA-256: 2450323b5904b07afb4e2cd4ef6d3e6e066499fdf4672bf6ebf0d7b671488fb4
font_01_sfnt_off00011a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3D 11296 bytes
SHA-256: 69bb26728a4f0e3f344caff4915bd3fa5d66275e9b1b56139b9b44a5631fce85