Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6718553f2674f5…

MALICIOUS

PDF

79.3 KB Created: 2021-04-09 21:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f3e39ce34b78cf4ece7af7bf8dfb15b4 SHA-1: 724b269a80dfe5b2d23fac131ff788cebdb18cb8 SHA-256: ca6718553f2674f521e8513d706f8c9a35bc0bcade5f58c3693d9a39fe131bf9
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 0.9997

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://golowaki.ru/strik?utm_term=basic+and+clinical+pharmacology+and+toxicology+abbreviation PDF link annotation
    • http://mokuduvejevuz.scienceontheweb.net/pegozuwoxas.pdfIn PDF document text
    • http://kajipim.mypressonline.com/arquitectura_barroca_en_america.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/19209953885.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/vocational_english_course_book.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/how_to_reset_a_milwaukee_m18_battery.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/plantronics_voyager_legend_uc_factory_reset.pdfIn PDF document text
    • http://lipuwisapi.mywebcommunity.org/despacito_trombone_sheet_music.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/vanatul/wimofoxoninipekelef.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/47576979638.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/the_lying_game_full_episodes_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/48149346801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08275c01-77fd-4354-b0f3-d68c0d6509e2/27264972173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9322b276-b6df-4e82-a449-48e58c7b1cf0/sukixodugajopisudaxuzir.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_f31464f9b8b04532af7cefdbe08090a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/coliformes_totaux_et_e._coli.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/47355662915.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/how_to_set_timezone_on_lacrosse_atomic_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4862f814-4aba-44cd-aec8-1280fe801501/present_perfect_continuous_exercises_esl.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/mutixamazasobuxizowofo.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/girezoxavobemen.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/guide_pratique_centre_songhai.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_9bc9d5933e494fbeaea4f136f19c6e2c.pdf?index=trueIn 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_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 5908 bytes
SHA-256: 7c113f3665a691fc4c7c7791eaabdb923bce841bb0b74498e0633835587cf249
font_01_sfnt_off00010745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10745 11848 bytes
SHA-256: 01f52e68a1a64d034c4a770a340d6a046e6f95c939fc4afc1cf854ced205e592

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