Malicious PDF — malware analysis report

Static analysis result for SHA-256 166d92b1e126e613…

MALICIOUS

PDF

84.4 KB Created: 2021-03-14 06:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8b425e9bb229eb059637879687b9a5bb SHA-1: 4c31cef13908b305f3458437dbd27ebd6b75e302 SHA-256: 166d92b1e126e6130b119528deb699c78182feb0bc150c296f9604ed9da974b4
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URLs points to an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/123?utm_term=rubber+sheet+supplier+in+ahmedabad PDF link annotation
    • http://pemotutafid.mywebcommunity.org/what_was_radical_about_congressional_reconstruction.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/7gvAgg6/rutufebuzigewenexoliwu.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/gifowutilev_dusuwexir.pdfIn PDF document text
    • https://naxozafo.weebly.com/uploads/1/3/1/4/131483391/lejemevixo-bilowuxuxe-bilutefevinaki.pdfIn PDF document text
    • https://nomibazet.weebly.com/uploads/1/3/1/4/131437462/646525.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/hbgfgj2/menafemasevagezunup.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/lesumapekag.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/jhHs2ji/43524437629.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/add_cd_player_to_bose_radio.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/50028285160.pdfIn PDF document text
    • https://kibapeti.weebly.com/uploads/1/3/4/5/134515129/05a28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://robefowoved.onlinewebshop.net/carruagem_de_fogo_partitura.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/bihari_gana_video.pdfIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/57557017895.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/11289061088.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/tennis_draw_sheets_australian_open.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/57327899208.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/everfi_financial_literacy_answers_module_8.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/age_of_industrialisation_class_10_notes_mycbseguide.pdfIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/mijunobora.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/wesimikodenebiveti.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 5344 bytes
SHA-256: 5f47ac62cc5f226d56810136175798f408944ccb5ae4438d48c9dc058c2b4738
font_01_sfnt_off0000fc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 10432 bytes
SHA-256: cc9a7ac9e18d0cde9e3ecd728a391e15f3d5e2f5b479f5b53034af1fc87443d6
font_02_sfnt_off0001203f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203F 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_03_sfnt_off00013592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13592 3628 bytes
SHA-256: ae0f3298924c8a44baf4c7fdbd116f97335eb3513ee4250c65cf4613c676d371

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