Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfdd1e1286c1fc6…

MALICIOUS

PDF

78.1 KB Created: 2021-03-03 16:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc65c89264d624138273ae7c7c8dccda SHA-1: da9b45cc9f03ad6a96af8a8e96f9bc9b3d2f175e SHA-256: adfdd1e1286c1fc6993b09ee447fb0577e858b2fe38d724d7f72738a531eac0a
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of external links and the overall heuristic profile suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://midufefew.ru/award?keyword=alex+rider+season+2+kyra PDF link annotation
    • http://kezinogirojosev.iblogger.org/53268659171.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/char_broil_tru_infrared_2_burner_manual.pdfIn PDF document text
    • http://xewixejixukumes.22web.org/zawerafukilabivib.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/sosirunesoloz.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/jilupuzowaroxijusax.pdfIn PDF document text
    • http://lekezoreg.22web.org/os_lusadas_lus_de_cames.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/CYDhba8/sesame_street_spanish_word_of_the_day_flor.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/kawotexulozax/blackberry_z3_autoloader_10._3._2_free.pdfIn PDF document text
    • http://duxuramubot.epizy.com/dodobibuwo.pdfIn PDF document text
    • http://fosisidevafepet.epizy.com/manual_midland_gxt1000_espaol.pdfIn PDF document text
    • http://maxaluvobewog.epizy.com/79503278047.pdfIn PDF document text
    • http://bupujipa.epizy.com/android_modem_software.pdfIn PDF document text
    • http://wofozova.rf.gd/46984211437.pdfIn PDF document text
    • http://sixuregorajaso.rf.gd/how_to_run_a_levenes_test_in_spss.pdfIn PDF document text
    • http://xigutawime.epizy.com/ballroom_latin_dance_music_free.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_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 5172 bytes
SHA-256: 38b71224df1b6999b1ca84ebb1fd3eeb180ca896793a8175b4fe471603441927
font_01_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 10124 bytes
SHA-256: 1654a5e882dddf9c63b8819ddc6d4ccb431e148c81f765137de11abb896f5e11

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