Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadd4b39de625977…

MALICIOUS

PDF

94.0 KB Created: 2021-03-25 01:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 510b3811c0b09109b9b50d42408495ba SHA-1: 5d62fa47bd45a231b0bdadce102bbe9a8f2f42d9 SHA-256: fadd4b39de6259771692e128cc31de1e2eca2f6d9930d233372f02260dc647b4
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=seismic+reflection+processing+pdf PDF link annotation
    • https://cdn.sqhk.co/kezagajasiw/CicEVKy/zekera.pdfIn PDF document text
    • https://cdn.sqhk.co/juvexafi/uMRMidc/mofomexuvuruk.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/5jiJzY6/anime_girl_katana_wallpaper_phone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452595/normal_5fd07ffd58c94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470024/normal_6003b01b5b69c.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/dudagizikotadajutapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392651/normal_604ec2480d63a.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/88068537985.pdfIn PDF document text
    • https://cdn.sqhk.co/bafujifi/HDyjghj/sunburst_granny_square_blanket_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/hejd4jb/studying_amino_studytee.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/Jghicib/wolf_girl_costume.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/niporofez/bible_niv_version.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/21693113972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e913f7e3-4bbd-476a-a08e-9af20aed8fd2/hayward_t5_salt_cell_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/40219986564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30eec027-d704-4ae4-8083-bc8a98db26bf/zoxufabumuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c1f60b-cfc5-4230-a475-1f6b460c2f36/gezefagak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1c9f36-a5da-4672-9862-d07bab00fe13/94384626327.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/46112422818.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAF 5368 bytes
SHA-256: 3c581a72d9f705aeec9381f80921fd4582dc5adc9442f6f920599453c2a7559a
font_01_sfnt_off00012ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDC 11556 bytes
SHA-256: 8292202b673e5845ba4407dc0f93006d16964928166c8ce16faa951247f7f1d4
font_02_sfnt_off0001559e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1559E 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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