Malicious PDF — malware analysis report

Static analysis result for SHA-256 20079e957710707a…

MALICIOUS

PDF

86.5 KB Created: 2021-03-30 21:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7860b397fd805b678a2a30cd55913df4 SHA-1: 7b70ae77162b0a77be2539a92a3f28bcfbeb5369 SHA-256: 20079e957710707a9add5605dc18e2911251089b59da49491f8cf3cc13a6ccc3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, indicating a likely attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed for SEO manipulation or to host phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=how+to+identify+mikuni+carb
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/devesafaxis_xixisijamuze_lekajeradi.pdf
    • http://gagitevanonuti.mywebcommunity.org/zitoxuwunalele.pdf
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/6686a276.pdf
    • http://busforpay.online/timex_ironman_triathlon_watch_alarm_instructionsu2c22.pdf
    • http://dewiwusuxutez.iblogger.org/eres_tu_maria_episodio_3_worksheet_answers.pdf
    • http://fofolep.mywebcommunity.org/65730047431.pdf
    • http://blue-tick-central.com/disogopozonafusoxusiw8yor.pdf
    • http://xavelodezazil.iblogger.org/51252335928.pdf
    • https://domisupufiz.weebly.com/uploads/1/3/5/3/135316273/jupinezejiduxe-pixakinelom-xukimamuvajod-buvasetufowow.pdf
    • http://feremujidonigu.getenjoyment.net/brene_brown_definition_of_vulnerability_dare_to_lead.pdf
    • http://maluxevuno.22web.org/asoka_full_hd_video_songs.pdf
    • http://circulyarkadigital.xyz/pidovegapof519z.pdf
    • https://dojinutek.weebly.com/uploads/1/3/4/1/134108596/gurawesusid_revami_wawipubirurik_liminer.pdf
    • https://pulogumofus.weebly.com/uploads/1/3/0/7/130739416/ruzugo.pdf
    • http://goodsun.space/shark_navigator_vacuum_filters85p5a.pdf
    • http://sagedix.medianewsonline.com/how_to_do_a_scalp_cleanse.pdf
    • http://ruvikuvi.mywebcommunity.org/47121612258.pdf
    • http://filebitikuj.iblogger.org/how_to_do_hard_reset_on_iphone_6_plus.pdf
    • http://jujovobima.getenjoyment.net/83810485968.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lakasixes.rf.gd/attack_on_titan_season_4_episode_4_manga_start.pdf
    • http://litabasiker.onlinewebshop.net/livro_noes_de_administrao_pblica.pdf
    • http://girupesoja.rf.gd/nijusokudobilaf.pdf
    • http://vurofanosikuga.atwebpages.com/ct_studd_biography.pdf
    • http://jolavewavesuj.epizy.com/isaac_item_cheat_sheet_afterbirth.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104f7.bin
3c71ea18a9b57e675743ff5b03c9238cf579a8524f1c9c67c6a318966c622ef4
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 5196 bytes
font_01_sfnt_off0001169c.bin
ce7bc7e7cfd1d1e1d3db374bc6394a0ed7c40fea7224c1bfae5a39ce1540c5b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1169C 12172 bytes
font_02_sfnt_off00013e12.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E12 4324 bytes