Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ab50df00ff51e6…

MALICIOUS

PDF

68.0 KB Created: 2021-02-02 15:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7cf1458cc8faec0961c4fea02d9bda4b SHA-1: 5274149371759c83bbc68d587295b86424e5be9f SHA-256: a3ab50df00ff51e62a46bf221fca68448b8ce9cef1270880b83b1251f94b33ab
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by both a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a significant number of external links, many pointing to disposable domains or link farms, indicating a phishing or redirection scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=citi+legal+department+belfast PDF link annotation
    • http://khareedforosh.com/future_save_me_zippyshareepkwf.pdfIn PDF document text
    • https://zapotaputilaka.weebly.com/uploads/1/3/2/6/132683001/mapames.pdfIn PDF document text
    • http://boomerangoo.site/rotipugipekj7s6q.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/dxjfzhg/bugsy_and_meyers_prices.pdfIn PDF document text
    • http://wei-nmvc.com/drum_set_online_record41kva.pdfIn PDF document text
    • https://bogibopedazite.weebly.com/uploads/1/3/4/0/134018154/1391626.pdfIn PDF document text
    • http://ctuxuu.com/hyperdimension_neptunia_episode_10ezdp.pdfIn PDF document text
    • http://mybestchan.online/himno_a_telesecundarias_del_estado_dm28j3.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/dyf1O8G/74710937315.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/bjaYvhj/vepokizi.pdfIn PDF document text
    • http://detonic-ordina.website/esl_dota_2_playlisthqw0o.pdfIn PDF document text
    • http://baltika-trans.com/autodesk_revit_2020_contentskuzq.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/idsYJii/war_of_the_roses_single_player_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/lekabewoz/ZjgCFup/vuwexo.pdfIn PDF document text
    • https://cdn.sqhk.co/titipubaduw/Y1JNie9/globe_at_home_app_for_laptop_download.pdfIn PDF document text
    • http://mmeueue.space/englisch_indirekte_rede_bungen_mit_lsungengsi6q.pdfIn PDF document text
    • http://copyrighthelpcentral.com/public_health_nutrition_course_outlinetq5fm.pdfIn PDF document text
    • https://bunupujitoj.weebly.com/uploads/1/3/4/0/134017728/gapaxalimuku.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://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_off0000c310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC310 5200 bytes
SHA-256: 5ff40845b6496ea2f6e093cc0c85fbdfb89f3b3f8694088f394acf7caf0ca362
font_01_sfnt_off0000d49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49C 9620 bytes
SHA-256: 098949e6e1b8ca68fe8b65763e4e04dde9c0afd9a5087e007dc1d79be27763b1
font_02_sfnt_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.