Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e643a2ff5e19fe7…

MALICIOUS

PDF

81.7 KB Created: 2021-03-26 07:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5a64a667735356bcf1d5bdb299c6616d SHA-1: 3c5b988a987d35d3de42f8cf69681c10da30abc7 SHA-256: 4e643a2ff5e19fe7a0be38cc0ef23d3655f1b8bc3bdb9d623425db328cf63996
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or credential harvesting attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/award?keyword=organizational+innovation+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/jofijoju/idhicd0/bifojivevikaruvugi.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/ggicibu/battlebots_2019_bloodsport.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/cmYDfXL/tapimomunaxov.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/guIghji/dekupizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_601ae40f2234a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_604df31e83014.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/hehfhfU/sharpshooter_crack_download.pdfIn PDF document text
    • http://fafabil.getenjoyment.net/mabekenugew.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/iaz6rza/18309011735.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/dMrjcji/the_world_of_magic_speed_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_602b49f77ccae.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/2ijbglC/gogeberuwotoxoru.pdfIn PDF document text
    • https://cdn.sqhk.co/norasoketika/rgijgT8/11238350310.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/rodotisotul.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/lowaxiziwozofuxaju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_6003b80150db1.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/punagilelabon/power_programming_with_vba_2016.pdfIn PDF document text
    • http://rawegutidum.onlinewebshop.net/anemia_defisiensi_asam_folat_pada_ibu_hamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/fapuxonabomiruv.pdfIn PDF document text
    • http://gubadif.myartsonline.com/sadekosinukoto.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/5199237415.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/24191717674.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/jakokiwunugatafagajis.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_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 5440 bytes
SHA-256: 0251b40a552b914b033c434b92335fe7f5e40356b911d040ea3d12b52adb2483
font_01_sfnt_off000110d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 11608 bytes
SHA-256: da97520781c1648a1760fb9102e6d6506191c1f5f648c6d6f61d1353b5954a92

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