Malicious PDF — malware analysis report

Static analysis result for SHA-256 327b4860c666ea11…

MALICIOUS

PDF

90.2 KB Created: 2021-03-17 17:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3c0e873f939d1cbfdc09143e37eff8de SHA-1: b00c2b152b44947769895e777fc6675a8c2bf766 SHA-256: 327b4860c666ea11b9462c6042e236aafaf37068cc8daacd61dcb8f315cac998
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://zajinet.ru/123?utm_term=games+cheat+code+book+free PDF link annotation
    • https://nezikuwetop.weebly.com/uploads/1/3/5/3/135346993/tinex_kijidutoxadeza_pinokaleb_salilutute.pdfIn PDF document text
    • http://ourfanz.com/pipelajubijomovakirom6cwei.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/sadenejajedomu.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/72363216350.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/butomujukev.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/hhfHDje/free_health_tracker_app_android.pdfIn PDF document text
    • http://kvrovk.xyz/general_release_of_all_claims_form_ukhvfby.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/zonobexowolomimubor.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/j4jhajf/diy_mask_with_filter_pocket_and_nose.pdfIn PDF document text
    • http://dokojekiferej.mygamesonline.org/what_time_does_the_ny_stock_market_open_and_close.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/jchamvj/sakexujerupejelivuvunuto.pdfIn PDF document text
    • http://funseeds.site/factoring_binomials_trinomials_worksheet56vaq.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/8b8501d.pdfIn PDF document text
    • https://fijuzezakuxulow.weebly.com/uploads/1/3/5/3/135391315/b73ad76edd38e.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/how_to_do_reflective_writing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fekejuw.atwebpages.com/bangkok_bts_map_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/48265372995.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/adobe_audition_3_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/17441522535.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/anganwadi_bharti_mp_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/female_reproductive_system_diagram_labeled_worksheet.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 5464 bytes
SHA-256: 72fe1e63ae2ea2ba7d0b9714f1a47efb5adbb71f4ae3067cbd463a5a3f95c69f
font_01_sfnt_off0001206f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206F 11424 bytes
SHA-256: 46c5a01c1db9ef397cdebc8c43f8e8b97beef3249eeccbb7fba3747a859ca8be
font_02_sfnt_off00014743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14743 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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