Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d6ff504baaa8df…

MALICIOUS

PDF

82.9 KB Created: 2021-03-11 00:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0e75f0b7455468e0767b01349ef3236d SHA-1: 13039c6252f405816f358ba15c3e10096d9eb8be SHA-256: f8d6ff504baaa8dfd2061a248bf4ba6d242d98a937af38945b640bd408b310e5
156 Risk Score

Malware Insights

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

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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/123?utm_term=annabelle+shopify+theme PDF link annotation
    • http://kilijosizujowo.medianewsonline.com/logical_reasoning_test_questions.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/9d98b.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/souad_brule_vive.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/iZjhbcB/truck_racing_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/womalakifaxa/gggcCGZ/stick_war_legacy_2_hacked_games.pdfIn PDF document text
    • http://pirojibanenuzi.getenjoyment.net/8217669922.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/dhbichi/sujoxuropavoxinufura.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/jekurikuluxadupug.pdfIn PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/bb3fdcba846ed4.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/Tgeiihb/mobile_wallet_purchases.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/28b6c7cd3.pdfIn PDF document text
    • https://musopikulaw.weebly.com/uploads/1/3/4/8/134851971/81f99ec.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/gibetesiris.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pujinit/wekujiji.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/nugopo.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/telugu_heartbeat_songs.pdfIn PDF document text
    • http://suxudogakol.myartsonline.com/honeywell_bms_system.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/zuzop.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/fundamentals_of_communication_systems_2nd_solution.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/47419015029.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/carding_amazon_android.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_off000107de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DE 5276 bytes
SHA-256: 018e5085eea7275942b87f04f594b1c0e589964a852f789b0e437f4b61619a06
font_01_sfnt_off000119b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B1 10684 bytes
SHA-256: 7b2cfe9c0bb23c92fd446cbfbd56932f40aa24ec0009c43c2c1e831a3c0e431d

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