Malicious PDF — malware analysis report

Static analysis result for SHA-256 b361ee2cda6ac3cf…

MALICIOUS

PDF

78.2 KB Created: 2021-04-26 21:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bbd7517ee313011eff57615445c28350 SHA-1: 607861b9e06ce54fdd9856d67f0899cb93cfe027 SHA-256: b361ee2cda6ac3cfe624ce7f6ce73178b370ee3b622403b8cac2b0ccc36bd68f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to malicious or phishing sites. The document body, though heavily obfuscated, contains text related to search queries, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://seumenha.ru/strik?utm_term=what+are+the+best+reusable+nespresso+pods PDF link annotation
    • http://you-bestshop.xyz/52245017152qhpg4.pdfIn PDF document text
    • http://robinmani.site/121615534820mxqo.pdfIn PDF document text
    • http://shoop-fh.ru/clash_of_clans_mod_apk_apkpure6c2ln.pdfIn PDF document text
    • http://goodsun.space/34709493084g3phq.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/zewiwulejolaniba.pdfIn PDF document text
    • http://infonewsuk.site/inside_the_tornado_moore0v177.pdfIn PDF document text
    • http://fetoxuk.mywebcommunity.org/22579177033.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/lutewojotedaxarerikomule.pdfIn PDF document text
    • http://small-italy.space/minecraft_apple_ipadh9d0h.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/aohgnij/buromowor.pdfIn PDF document text
    • http://idealica-italy.site/tunutosivabazolojowuz1qu1u.pdfIn PDF document text
    • https://cdn.sqhk.co/xewumoxu/dghjjij/build_battle_royale_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/hbWHTQA/79429051891.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/bgd3gir/bedroom_furniture_sets_clearance.pdfIn PDF document text
    • http://bunnygummy.ru/how_to_get_dmv_appointment_fast17yj5.pdfIn PDF document text
    • http://italiahot.fun/piano_music_for_studying_mp3_downloadpzfy4.pdfIn PDF document text
    • http://korecos.ru/fodizikipw1id.pdfIn PDF document text
    • http://texivej.sportsontheweb.net/pekevajezejulawo.pdfIn PDF document text
    • http://sellforce.ru/banner_saga_review_androidiqko8.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/international_phonetic_alphabet_book.pdfIn PDF document text
    • http://milansit.space/1554092591530upz.pdfIn PDF document text
    • http://fasadi.site/pronoms_relatifs_exercices_avec_correctionrm3il.pdfIn PDF document text
    • http://1xbet-regi.site/structural_family_map_examplec9uo0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosevasejila.myartsonline.com/thomas_nelson_niv_chronological_study_bible.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/learn_python_the_hard_way_version_3.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/fudenadavimanufejomuba.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_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 5200 bytes
SHA-256: ddeb2d6fdc38a092be5763348ecefd534240566f7a71cfc8fcdcde0a2fe106e0
font_01_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 11308 bytes
SHA-256: d7a5f05f8495affcd7b74ec707cf9a231ce3da9b13febcc18dbcc28434b07fe4

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