Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bc97ad8fa196a4…

MALICIOUS

PDF

79.8 KB Created: 2021-03-31 21:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3bc3760e300d2ee5f88cfa43d82224aa SHA-1: b3afcddd99d7d797a354b79c47be6e9bd99d0c19 SHA-256: 30bc97ad8fa196a49caf19b8032e51a63725371cc4547cf249f2e827dfca3dd4
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 0.9991

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 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://druttle.ru/wix?keyword=vivid+verbs+worksheet+pdf PDF link annotation
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/859b2.pdfIn PDF document text
    • http://mamontov-net.cc/lukisibuxatejifuwac143j.pdfIn PDF document text
    • http://joblanc.xyz/how_to_remove_splat_hair_dye_from_hands8u9a6.pdfIn PDF document text
    • http://accueilcmb.com/baby_im_yours_memetw958.pdfIn PDF document text
    • http://rkconstructionsucks.com/rusarewotizexubarajeso2xnnq.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/fisonapatamaruxufo.pdfIn PDF document text
    • https://cdn.sqhk.co/dagizonu/ggH31ia/net_framework_v4_0._3019_offline_installer.pdfIn PDF document text
    • http://risonubokedoxav.scienceontheweb.net/different_types_of_bacteria_names.pdfIn PDF document text
    • https://cdn.sqhk.co/tokejosanawo/iiGZGjf/abernethy_malformation_radiographics.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/xesej_muburinifejij_zominup_mawalavoge.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/definicion_de_poblacion_autores.pdfIn PDF document text
    • http://soinjaga.ru/gexaji44gsx.pdfIn PDF document text
    • https://cdn.sqhk.co/kulabokirow/d15Myih/bepuwukot.pdfIn PDF document text
    • http://help-bluebadgecenter.com/ucsb_data_science_major_sheet9mi1y.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/kopotijawufikeb.pdfIn PDF document text
    • http://volosaty100.xyz/20551731830urceb.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/pegava.pdfIn PDF document text
    • http://grigolia-studio.ru/briggs_and_stratton_450e_series_oil_changec0j5a.pdfIn PDF document text
    • http://kowuterada.mygamesonline.org/lightest_reader_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/emIvYij/crazy_games_zombie_mission_3.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/rutefozezapikadewe.pdfIn PDF document text
    • https://balerezun.weebly.com/uploads/1/3/4/6/134665840/xexugapalepe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dozopedatofol.atwebpages.com/administrative_law_meaning.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/lijudapa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 5208 bytes
SHA-256: a9fcbead88d587ea2d6416e1b50f61ca238b332feea44776c3f317910210ce22
font_01_sfnt_off00010b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B50 11220 bytes
SHA-256: 94e2778a644f8af7c2b52a6f759cd9a575c9c0d0b0893b44975075b5c54323f0

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