Malicious PDF — malware analysis report

Static analysis result for SHA-256 853e57c42a3a8614…

MALICIOUS

PDF

88.1 KB Created: 2021-03-14 06:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58ef344872993a5f47d4a09d9fc7fa41 SHA-1: 82afda895883e09cd6ab9e6f91d6c849013a3414 SHA-256: 853e57c42a3a8614f61fb2d32fec0b073ce11c51da7926eee05ed2016579311f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://xezojetit.ru/wix?keyword=blade+and+soul+force+master+guide+2019 PDF link annotation
    • http://vash-komfort5.ru/chamberlain_940ev_instructions8cymy.pdfIn PDF document text
    • https://fimiximokizo.weebly.com/uploads/1/3/1/3/131384127/lijutewugujug.pdfIn PDF document text
    • http://malespw.xyz/5767136398do5wr.pdfIn PDF document text
    • http://reduslimitaly-official.site/iphone_rock_ringtone_download_freez46xj.pdfIn PDF document text
    • http://maduzisuzavi.22web.org/ziwunutunabu.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/xewupejomalap5bi62.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/zomeguzanivude_vigotetazuximil_wamiwigususuw_ziwuvo.pdfIn PDF document text
    • http://afterdealer.pro/diy_glider_simulator_cockpit2d6e6.pdfIn PDF document text
    • http://musofiron.ru/vexasaxeknu8t.pdfIn PDF document text
    • https://wuvonavozaf.weebly.com/uploads/1/3/2/6/132695620/suwab.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/davulun.pdfIn PDF document text
    • http://tareputufo.22web.org/70540732334.pdfIn PDF document text
    • https://vodakobawuvij.weebly.com/uploads/1/3/4/6/134627811/7747562.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://biborufa.epizy.com/eliphas_levi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/zotixekuvexob.pdfIn PDF document text
    • http://fudavifakafolid.rf.gd/zosibuwil.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/real_estate_brochure_free.pdfIn PDF document text
    • http://resogugibu.rf.gd/82296553124.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/sagameg.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_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 5756 bytes
SHA-256: cbf94e7411bfab1d51ef07ebea96b4919227ac5e4932377719ebfd14c5513e3d
font_01_sfnt_off0001090a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 10216 bytes
SHA-256: a5378b9e75aceb77c3a9f75e60f2fb226498a6a3331c3f78cdb214008a64c504
font_02_sfnt_off00012c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C43 16744 bytes
SHA-256: 0c821ab8ec5063b4beb8ede8a2eff403379680b662fede973bf6fe49e651f125
font_03_sfnt_off000142d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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