Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4daa25302e4c00…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 16:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 440743404ba5f5708f4add92a904438b SHA-1: c24c0f414ba6e1de93fe914e68f4242818f77fe6 SHA-256: 7c4daa25302e4c0011be86e82144cd4c3732685180a58f901bd10a865145408d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms or phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further support its malicious nature. While no scripts were directly extracted, the embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=advanced+quantum+mechanics+pdf+free+download PDF link annotation
    • http://lamaded.mywebcommunity.org/sex_and_the_city_2008_movie_poster.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/34837539021.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/revitavagapiwituz.pdfIn PDF document text
    • https://rewagafiwexufot.weebly.com/uploads/1/3/1/8/131856649/3934344.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/17092999286.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/tl4iegg/fort_squad_free_firing_battle_royale_2020.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/how_do_you_reprogram_a_white_rodgers_thermostat.pdfIn PDF document text
    • https://cdn.sqhk.co/wejewenu/je6ghfs/lubuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/hjihtnb/54422838105.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girofili.myartsonline.com/geometry_chapter_3_resource_book_mcdougal_littell.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/motorola_xts_3000_radio.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/honeywell_electronic_gas_control_valve_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/guess_the_brand_level_53.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/9777555041.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/fogokozero.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/vonogavur.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/berselancar_untuk_mencari_informasi_di_internet_disebut.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/17470979864.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/wireless_n_repeater_wps_connect.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/88869946733.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_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 5660 bytes
SHA-256: 5bf4735e8fe89e03aa8a751f09774b6babd27cd8994b7d343979f16e1ebd3b94
font_01_sfnt_off0000fe70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 11384 bytes
SHA-256: de2789212da2e90df30487009ab0dcd6947345b1d717f125226681bf8443debb

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