Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3e5215dd527939…

MALICIOUS

PDF

78.7 KB Created: 2021-03-21 21:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bb853846c2eb9b0b564d3db41fecffe4 SHA-1: c323a7ef96e06d8dee86251d3b3290ae87401723 SHA-256: 4a3e5215dd527939b25fd8b5f91ff4788ef76ab5d83f782b51b8199531f200da
156 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 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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=badger+patriot+105+compressor PDF link annotation
    • http://kyponnik.online/741600635928qgyk.pdfIn PDF document text
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/jofiw.pdfIn PDF document text
    • https://widadosu.weebly.com/uploads/1/3/4/7/134715299/cdb32.pdfIn PDF document text
    • http://hytri.com/g_shock_wr20bar_bandlet9z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470402/normal_5fed724f1be5b.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/xixejimin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387229/normal_6008d4658f7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_600df7b20e81a.pdfIn PDF document text
    • http://findonelove.online/driver_updater_free_for_pcv5eku.pdfIn PDF document text
    • https://galanutix.weebly.com/uploads/1/3/4/5/134591813/kuzomosiju.pdfIn PDF document text
    • https://vixananuxa.weebly.com/uploads/1/3/4/8/134881407/liwiviludog_funopekofip.pdfIn PDF document text
    • http://zoneeuro.pro/raneko0l0xq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_60430251d9000.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/zazelujeju/hangeul_master_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/fikokepipamubifon.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/torch_browser_latest_version_free_filehippo.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/34504462219.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/good_places_to_play_dd.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/kenwood_dnx692_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/65865308316.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/email_newsletter_template_size.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/ali_kiba_mvumo_wa_radi_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/form_1419_australian_visa_application.pdfIn PDF document text
    • http://wukevivetarapu.myartsonline.com/embrace_pet_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/wijakozikinixut.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 5728 bytes
SHA-256: 55f44cca25bca43b9fe337346e5a560ad336646936a62447f7017d1830f50e58
font_01_sfnt_off000107c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C5 10636 bytes
SHA-256: b469ab11475947e8d68a7a535eedfa7409a4eecc12b0b02468d6012288bc22b3

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