Malicious PDF — malware analysis report

Static analysis result for SHA-256 9908c9e924062897…

MALICIOUS

PDF

79.0 KB Created: 2021-03-30 19:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e9157cee1af83c6bb7036894511100b7 SHA-1: 93cbe1d2d6f148971bba15147480086d3c4dc890 SHA-256: 9908c9e924062897c31a1cbb4fad632e43deb16cb1fa20ca94ebca5c174d8cc4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://dugedepap.ru/wix?keyword=4th+grade+dolch+sight+words+list PDF link annotation
    • https://wabegikabakupoz.weebly.com/uploads/1/3/4/6/134668284/punafobapofiv_barenito_fedodis.pdfIn PDF document text
    • http://misstourist.info/how_much_does_a_2003_coleman_pop_up_camper_weightdpk2j.pdfIn PDF document text
    • http://lg-copyright.com/lepagov13uf9.pdfIn PDF document text
    • https://jifibixivedud.weebly.com/uploads/1/3/6/0/136082986/rubokoxew.pdfIn PDF document text
    • http://getchambre.xyz/quadrajet_vacuum_line_diagramuv0xu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5ffcc46b1cdb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454430/normal_60531011b0ea3.pdfIn PDF document text
    • https://vuxabodunufa.weebly.com/uploads/1/3/1/4/131407539/4349973.pdfIn PDF document text
    • https://bagetakibejo.weebly.com/uploads/1/3/1/8/131871627/34e8dbb602.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://fiximumar.weebly.com/uploads/1/3/4/3/134345920/8d316a1d55a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4115ce32-2544-4fca-b0cf-834cf1daf7fd/wifuvufiwitilatuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b330d91-74c0-4b04-8de7-b59eadedfecd/tuxudowenabekoxired.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/iti_maharashtra_admission_online_form_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d653ce5-ab89-4ef8-99c0-f5d4ce865cec/the_road_less_traveled_sign_meaning_robert_frost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2dd137-e52a-4899-9924-a51c9bc35860/what_is_text_structure_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f683ff2b-7921-4199-a827-7b66201de4a4/how_to_draw_fun_stuff_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/51657188144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd1a614b-c231-48ee-b0e2-41f7e496d120/ms_excel_2007_practical_exam_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f1dd5b-61b4-4ad8-9e14-dc4264714db8/wufevosavefulezimafisunov.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_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 5284 bytes
SHA-256: bfd2a0176ad02818216f3fea5ba95c6aac0734182bca3763f2f111801b8af6e2
font_01_sfnt_off000108b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B8 10652 bytes
SHA-256: 7442cab75367bd955c63789e81d68f8b2688bbd9f78c600513acb2699e0b7b9f

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