Malicious PDF — malware analysis report

Static analysis result for SHA-256 edbf101c4079cb5a…

MALICIOUS

PDF

78.4 KB Created: 2021-03-12 13:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 91bd32822a159cc5bec6cb88650653bc SHA-1: 5ef47a51f3587f97dc726e878c36ea1c05dd9d9f SHA-256: edbf101c4079cb5a3f7981c490fb494dab730aa9ad896f4fc22074819d70bde6
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 0.9992

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://nipisod.ru/award?keyword=bookkeeping+for+dummies+canada+pdf PDF link annotation
    • http://getsol.xyz/95617118093029p4.pdfIn PDF document text
    • http://wonder-ita.fun/gskyer_telescope_manuala2m5g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446395/normal_6015c074d1524.pdfIn PDF document text
    • http://1gusevshop.space/temebuguweceus1.pdfIn PDF document text
    • http://doordash.link/kokogorigawoxogasipe2xux.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/ghieIL5/slot_machine_games_for_real_money.pdfIn PDF document text
    • http://autocredit.moscow/27476003476hdd0p.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/hfr86k8/90683432972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_6039b2653c8e7.pdfIn PDF document text
    • http://blognews.top/exercice_polygone_ce2_en_lignehw8qp.pdfIn PDF document text
    • http://vekvelo.ru/pidukapekarutije95z1j.pdfIn PDF document text
    • http://mon-fortuneo.best/39271278437wp619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_603381410a008.pdfIn PDF document text
    • http://leree6.club/744590748916kkbn.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/ugdjaib/bucky_s_convenience_stores_council_bluffs_ia.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/fc001cf8-4edb-44bd-b723-95ae1b7f2b2d/sawimijibosexasul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3589a0d0-ca76-4c84-9158-5e32c9bebdaf/vefiwofavap.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/20036878803.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/maviwagidotejuvepin.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/bardasht_nahi_kar_sakta_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/addaf874-6df3-49a0-ad78-08dd4e7cf293/93160065568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae18668-d376-44ba-9016-724b92054dca/vujezarometujuxilibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1766f9ce-ea93-4605-80f7-e71a98cce7c9/most_uncommon_last_names_in_the_united_states.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/vugokogonokikavoraxoferuv.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/10_verbos_irregulares_en_ingles_presente_pasado_y_participio.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_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 5556 bytes
SHA-256: 5fdeb37becea4f0abb9d89840a309c941673986725c3fea7d51d3047ae3f5c15
font_01_sfnt_off00010724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10724 10808 bytes
SHA-256: a934623fb122cbdc41d7b7fb2671765808198a69e941b22109530ecab4ccac97

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