Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7592d7e6a256a5e…

MALICIOUS

PDF

72.0 KB Created: 2021-03-17 00:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 60f17db58e2b4af7a8d7511c2d51cb22 SHA-1: 3820e43cbc5ed2ea9fb00de47dbbf17279207fb5 SHA-256: b7592d7e6a256a5e19bad8a51ffcadd9331dc79d94774938b84c627ab8a622e4
126 Risk Score

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 0.9955

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/wix?keyword=mi+vida+loca+episode+4+answers PDF link annotation
    • http://kumajamefe.getenjoyment.net/palovo.pdfIn PDF document text
    • http://lufexaxoxak.mygamesonline.org/armadale_train_line.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/system_administrator_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/1xiaBNs/kinobomux.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/jdhj535/sojobomakeriragazitomu.pdfIn PDF document text
    • http://bafakuvim.sportsontheweb.net/jobatobaripilebodavib.pdfIn PDF document text
    • https://cdn.sqhk.co/najiligopej/AdifieH/linadepisijekapa.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/96371837863.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/38377226238.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/brahmi_rediscovering_the_lost_script.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/ijkowrl/tonero.pdfIn PDF document text
    • https://cdn.sqhk.co/parepejapoki/hdieMhg/offroad_legends_driver_3d_model.pdfIn PDF document text
    • http://libotopatolar.iblogger.org/biosynthesis_and_catabolism_of_catecholamine.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/latafi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_4aa646321e054f8fbc8e0a041f6422e9.pdf?index=trueIn PDF document text
    • http://zujakogi.onlinewebshop.net/xeforokej.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/85319772090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd9fbdd-2f54-45e9-bb7d-0ed2948d268c/maytag_quiet_series_200_dryer_belt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/120b4e57-8551-48da-9b3c-b51da2b5496c/xoxivavirurebadizisexinok.pdfIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_36601fa74dc742bf996edf5fb9d6fb06.pdf?index=trueIn PDF document text
    • http://posufimiru.rf.gd/bsmrstu_admission_circular_2020_19_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de205118-aed7-42ab-9a52-10957d2b4545/dish_network_losing_channels_2020.pdfIn PDF document text
    • http://xinudigiwuwa.epizy.com/tofivewujarenomaper.pdfIn PDF document text
    • https://ecc4b077-82d2-4cf1-ad45-1e482560a890.filesusr.com/ugd/5d7ac5_37617439e8664671af3706e796098a00.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_da8f4165b3fc4987acabd79893807669.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e8f18e-3d28-48b9-b50e-e42203893794/tuwuwuvizodepozure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4fd80f-aa9d-452d-bedd-d3bc2c74a49c/todobizedavikixibexolosup.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_off0000d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96B 5312 bytes
SHA-256: 11a95fdb04df3471dd7cbe0f271bb46c0d8067b6bf46b7748a35947742e1084e
font_01_sfnt_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 10920 bytes
SHA-256: a1d2fc136447948289c791b15d0e6679e0f0e0b6b7081756b3186b49f8081bd2