Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4178edcb84b26df…

MALICIOUS

PDF

69.1 KB Created: 2021-02-23 10:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2dd92f637cfceb1b889ed37dc4480141 SHA-1: a44ce703a21923aaff817e5adc0c714c4981ed81 SHA-256: a4178edcb84b26df4c8c735491f1eed718dd3ea6c5e347a0d511daf6d00952fb
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample was detected as malicious by ClamAV and flagged by an ML classifier, indicating a high likelihood of malicious intent. The 'SE_REMOTE_SUPPORT_LURE' heuristic strongly suggests the document is designed to trick the user into installing remote support software, a common tactic for phishing or malware deployment. The presence of numerous external URLs, many pointing to disposable domains, further supports a phishing or malicious download campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=is+the+dyson+v11+worth+the+money PDF link annotation
    • http://lngcliente.com/hunger_games_catching_fire_chapter_13_summaryo43f8.pdfIn PDF document text
    • http://itprod.space/rocket_man_elton_john_lyrics_geniusy3b4g.pdfIn PDF document text
    • http://tevojagi.iblogger.org/another_word_for_nonviolent_civil_disobedience.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/8LhcEnS/31289909763.pdfIn PDF document text
    • http://xadukododefisev.22web.org/zitejelafowosezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_601fae1f519f7.pdfIn PDF document text
    • https://falerelijiwega.weebly.com/uploads/1/3/4/6/134612416/4497987.pdfIn PDF document text
    • http://papotanepif.22web.org/tegaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_5fd813cc67470.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/xHoNibq/57003732598.pdfIn PDF document text
    • https://fisulujat.weebly.com/uploads/1/3/1/4/131454297/8443507.pdfIn PDF document text
    • https://bobidowi.weebly.com/uploads/1/3/2/7/132740787/dusuvizutufudi.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/Hifijxh/underground_parallax_wallpapers_sans_friskin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://begupegag.epizy.com/balidan_movie_songs_video.pdfIn PDF document text
    • http://vifowas.epizy.com/gufufuwozabor.pdfIn PDF document text
    • http://bobupugarini.epizy.com/9277433100.pdfIn PDF document text
    • http://sasunuvelew.epizy.com/demonstrative_worksheet_for_grade_6.pdfIn PDF document text
    • http://gijifosunusu.epizy.com/captain_tsubasa_dream_team_apk_mod_ita.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_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 5064 bytes
SHA-256: dbc2efdc29d64a42531be51b0c4edcf75c0f1b17dc339e2bc1fc6984eee2153f
font_01_sfnt_off0000e37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 10428 bytes
SHA-256: 0e65f035b828ffda5ff461078428afa1d82e11d6fdd0dc8a4b414c57f172d015

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