Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f990a04c7da63a8…

MALICIOUS

PDF

87.0 KB Created: 2021-05-16 05:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 916d6b7625fea63f052ccc3fa5d93bac SHA-1: d5ff8594387b2c835435e9f1081f121ae9fd0456 SHA-256: 8f990a04c7da63a8ad052239ea5081c3cde342567ebc69be80ad038e44ff21b3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=8+parts+of+speech+definition+with+examples PDF link annotation
    • https://zogozunenu.weebly.com/uploads/1/3/5/3/135399222/2b464c0.pdfIn PDF document text
    • http://topchambre.xyz/368645627858knpq.pdfIn PDF document text
    • https://fuborevotoxuto.weebly.com/uploads/1/3/4/0/134017795/fotefi.pdfIn PDF document text
    • https://wezefumuge.weebly.com/uploads/1/3/4/6/134614004/4579556.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/2086228.pdfIn PDF document text
    • http://lighterusb24.site/wendys_burger_nutrition_informationguvaz.pdfIn PDF document text
    • http://ketotreno.buzz/panuxuxodobewemekunevurej2arbt.pdfIn PDF document text
    • http://trickyturkey.com/pagitulezidecufzp.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/lososimap/dowoguzolitisijinu.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/les_miserables_abridged_james_k_robinson_audiobook.pdfIn PDF document text
    • http://lifosodutevofa.epizy.com/84618877191.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/bruneaux_creature_of_habit.pdfIn PDF document text
    • http://vigevelo.rf.gd/scream_free_parenting_hal_runkel.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/xubasagimevakiburumosite.pdfIn PDF document text
    • http://zabidogadifosis.rf.gd/cimbrian_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d73a2d9-9655-4b2b-9950-257be1ed7ac3/nusolalofewitenenidov.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/best_army_mission_games_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a693051-da29-4e2a-81b7-b5eb0cc2c07f/can_you_upgrade_dyson_v6_battery.pdfIn PDF document text
    • http://nakepusigazu.epizy.com/mafexiwibeluxidinipale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabb6f3a-dad8-4e22-a2e7-47429280a0a7/a_flowchart_proof_presents_a_logical_argument_using.pdfIn PDF document text
    • http://minofadejewezup.rf.gd/internet_radio_player_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/ripemefajomodiremedek.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/taderazowinamasej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df6c5a15-969b-4cf6-93a4-b4f618740f60/feliz_navidad_jose_feliciano_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/economic_facts_and_fallacies_second_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/badoo_premium_apk_5._61.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 5656 bytes
SHA-256: 84a1a4f3765037ba05c5005d862e3d4de276aad91c19dbacaf9bdd06ee747036
font_01_sfnt_off00012846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12846 11332 bytes
SHA-256: 59d500c38e841a213c162f2c2904f8b163544f0f8e86ae6a7e84b6535c34cff0

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