Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66c7d958d784472…

MALICIOUS

PDF

76.4 KB Created: 2021-03-06 18:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9220fd47dfed92fc523960de93737c00 SHA-1: d39bd12759e32dbf62b47363d33e2bf4994167da SHA-256: e66c7d958d7844723bb1897e04b42a4b6cac2401052a89895d286c0e20a22477
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The document body, though heavily obfuscated, suggests a lure related to a 'rent agreement form', aligning with phishing tactics. No scripts were extracted, but the overall structure and URL usage point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=nj+rent+agreement+form PDF link annotation
    • https://jigupeditu.weebly.com/uploads/1/3/1/3/131380623/a1b8e4a5af9.pdfIn PDF document text
    • http://losinglotterynumbers.com/game_centre_app_androidouu0f.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/backbeat_fit_wireless_sport_headphones__mic.pdfIn PDF document text
    • http://newoxoxi.mywebcommunity.org/67609771986.pdfIn PDF document text
    • https://xukotonaxi.weebly.com/uploads/1/3/1/4/131453431/diwadi.pdfIn PDF document text
    • https://xuwawimo.weebly.com/uploads/1/3/0/7/130739806/mizavewomaju.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/how_to_reset_a_viper_car_alarm.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/constitution_scavenger_hunt_answer_key_us_government.pdfIn PDF document text
    • http://italywow.space/endless_love_the_myth_piano_sheetznzjk.pdfIn PDF document text
    • http://cesaregaspari.com/peparidiwud4zv5.pdfIn PDF document text
    • http://prodson.fun/2284312991nmggy.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/can_flavored_condoms_cause_uti.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/libro_gramatica_y_ortografia_basica_de_la_lengua_espaola.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/78393931964.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/wagarodotivujozotijesuke.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/book_hotel_24_hours.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b0ed0d-5143-4937-a68c-662ef6de56e8/40965716067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ed6e89-dddc-4f61-8d43-5c4301a10907/zafaze.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/8835654359.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/king_size_fitted_sheet_only.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/piriformis_injection_under_ultrasound.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/free_colouring_sheets_paw_patrol.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 4924 bytes
SHA-256: b37965d179dec19a8ef4721e85788cd78708a020cdb8240b0236a8b6ac22bac8
font_01_sfnt_off0000ff99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 10896 bytes
SHA-256: 384f5942084de162daef35c503dfacbb807e240ce8263cb02321e282456d614e

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