Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c33bcea512884a0…

MALICIOUS

PDF

73.4 KB Created: 2021-02-13 02:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fc9cdb8fe67615d11dc3deb314dc2279 SHA-1: 8b8b69067edc6ea28b5e5538eee839de834fb932 SHA-256: 4c33bcea512884a00ab230f4bcdd6d40a45784581ed48d653721eb0ce081e378
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 0.9998

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://jacksth.ru/123?utm_term=the+haunted+hathaways+season+2+episode+21 PDF link annotation
    • http://allrecipes.pro/tepuduxo2ul8x.pdfIn PDF document text
    • http://winoorama.space/weather_station_wind_directionnutqt.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/vibozugok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491670/normal_5fd2e35150217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421630/normal_6012e0d8e1639.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/zutaro.pdfIn PDF document text
    • https://petodudugagakot.weebly.com/uploads/1/3/4/6/134640630/2543968.pdfIn PDF document text
    • http://love-cosmetics.shop/17087362997b4sr9.pdfIn PDF document text
    • http://daravto18.ru/nifadif0octm.pdfIn PDF document text
    • http://fruits-summer.fun/coin_master_free_cards_today_daily_linksa50k1.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/bal_hanuman_wallpaperqos39.pdfIn PDF document text
    • http://plusstore.pro/seminer_etkinlik_raporurnxj3.pdfIn PDF document text
    • http://construt.site/zaduza27042.pdfIn PDF document text
    • http://uscovidcharts.com/vedarofotomopiwevym96r.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/muxozuvalubi/15141269700.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/gonene.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/canon_ip2700_resetter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/anesthetic_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/56559220105.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 6

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_off0000e006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 5244 bytes
SHA-256: 881cc9446ed931b676ebacdec70360c143439e56cd9fb2995388915e76605379
font_01_sfnt_off0000f1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 11184 bytes
SHA-256: 3db513232fd4e9ecf6e819a0f5fa7cdacb9d69061400838d07d27a7fbf5d1c29

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