Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4abf0f174ebab18…

MALICIOUS

PDF

71.1 KB Created: 2021-03-24 10:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a1b3f08919f3e23d27f61c4dd126982c SHA-1: df94cadfee929c21df130f7f6c58566786a8449f SHA-256: c4abf0f174ebab187b89b044c2045a93a11ae2f7bacd81e37f310f939aea1add
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=riven+vs+illaoi+s10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475383/normal_5fd757ebe6a8b.pdfIn PDF document text
    • http://pisufixefonof.scienceontheweb.net/rulesugujupidopor.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/fixomosofitozazuru.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/brother_hl2170w_setup.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/79041842311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444638/normal_60535853b1b9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369802/normal_5ff780ac85049.pdfIn PDF document text
    • http://sebezedamewem.iblogger.org/does_matcha_have_more_calories_than_coffee.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/11913462728.pdfIn PDF document text
    • http://deemonatrafik.xyz/wifi_booster_pro_full_apkvu6ix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_6030567b3ad59.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/appsc_group_2_notification_2020_19.pdfIn PDF document text
    • http://salleapp.xyz/how_to_make_a_kitten_friends_with_a_dogf4uod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surenus.epizy.com/ninjutsu_techniques_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/nubudexekaridinegomum.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/dilbar_janiya_song_video_mp4.pdfIn PDF document text
    • http://xizokenimufewom.atwebpages.com/96866679177.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/bin_sachivalay_paper_solution.pdfIn PDF document text
    • http://guwibigebozodeg.rf.gd/kaduno.pdfIn PDF document text
    • http://bepapogijarepub.rf.gd/badami_bhutanatha_temple_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/videohive_halloween_opener_free.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/plant_classification_worksheet.pdfIn PDF document text
    • http://radavukekugam.epizy.com/banebaruvoniwijufetirufak.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/burger_king_application.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_off0000dbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAB 4844 bytes
SHA-256: bc4871bc7d2980e27283020717922431d38a8b8976514538122b261e90106e57
font_01_sfnt_off0000ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 10256 bytes
SHA-256: f39e360805c4a2dcc133ac7469fb2f83c642994ff632811af7c137c6596d722f

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