Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b147400fb75286…

MALICIOUS

PDF

80.0 KB Created: 2021-03-05 00:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b31407c0ec33c17fde02ae8fceb58651 SHA-1: 4c1611d03e0d36666dbf15eb9257e10af3d477dc SHA-256: 66b147400fb75286c077585c79832d5cfcb2424a294d32dff0e26319699f2fd4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically identified as a link farm with UTM parameters. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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 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://jottigo.ru/strik?utm_term=the+riveras+season+1+full+episodes PDF link annotation
    • http://piwulag.sportsontheweb.net/ponozokexulugitake.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/what_is_the_best_free_golf_gps_app_for_apple_watch.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/casio_illuminator_wrist_watch_price_in_nigeria.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/wivulopixaj.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/20708995851.pdfIn PDF document text
    • http://cocobeautybar.ca/59123701975lrsax.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/sony_xplod_speaker_price.pdfIn PDF document text
    • http://jubigale.scienceontheweb.net/what_is_the_latest_version_of_amazon_kindle_fire.pdfIn PDF document text
    • http://uscreditinquiry.info/301231401875vc5h.pdfIn PDF document text
    • http://detonic-de.website/street_music_by_arnold_adoffvudsv.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/liluzinig.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/best_statistics_and_probability_textbook.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/54058736585.pdfIn PDF document text
    • http://remastacer.com/african_american_full_history_moviesydsjs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotubune.myartsonline.com/pofoxuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f4105d-8f97-4af1-9a51-c4bf24161c14/cs_lewis_mere_christianity_book_3_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/bumifuvaz.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/what_is_the_difference_between_fanatics_and_adidas_jersey.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/saxuzokibidajon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359c8a7c-13ef-4e1e-ae05-c1d81af99d3f/delorme_inreach_will_not_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/dapoxinibexakimejufu.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/lijutuzom.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_off0000fa65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA65 5192 bytes
SHA-256: 301d3d0812b31a08a0bcf97e6186e3d5b8877588bc36d5bfeca568eb752bd0e9
font_01_sfnt_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 11220 bytes
SHA-256: 845057d44c9a61bf1850520f1b17be948620985e196ec7509fda27be9caffbc8

Open this report in the interactive analyzer, or submit your own file for analysis.