Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bce675fc198565e…

MALICIOUS

PDF

87.1 KB Created: 2021-03-10 11:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a925a14148fbb3b0360a07799a98813b SHA-1: 9b6c6846ba9a27ca02fbc3dd1e3bcf789b42dd0d SHA-256: 4bce675fc198565ea344890cb188e12b5e3ce9adca46516ba2f26a84a2323910
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 0.9990

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://midufefew.ru/123?utm_term=chemistry+notes+form+4+chapter+9 PDF link annotation
    • http://rowowesofazov.medianewsonline.com/the_walking_dead_comic_online_espaol_1.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/dragon_ball_super_manga_full_set.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/jJrja0H/1c_big_keyboard_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/dgBUjfV/space_force_season_2_release.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/vhakhcR/propane_steam_tables_for_sale_craigslist.pdfIn PDF document text
    • http://labiosdewonda.com/63721026882yqcws.pdfIn PDF document text
    • http://znalomstvavip.site/dadadagetobifexijinepeif13i.pdfIn PDF document text
    • http://lnstagram-office.com/cambrian_period_ep_2_eng_subp39ij.pdfIn PDF document text
    • http://fakereruzab.iblogger.org/21462070743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_6013313a00f5e.pdfIn PDF document text
    • http://photoforce.ru/379866739314loid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_603bc4b97c782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454045/normal_603aeb642c8a8.pdfIn PDF document text
    • http://milesnires.xyz/sheetrock_anchors_home_depotpf7ny.pdfIn PDF document text
    • http://jogemutujup.22web.org/approximating_irrational_numbers_worksheet.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/428e165b-8bdb-4eb3-8a84-c9faa7d1e76c/25059978186.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/what_is_a_paragraph_proof.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/sabelifarimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2417813-9111-47c4-960e-f26b4dd301a6/74130162146.pdfIn PDF document text
    • http://lexubaxamomaw.rf.gd/99_names_of_allah_nasheed_duff_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6caf8a1f-24c6-4fb1-9d46-ecb24e03ff23/fisifomagaporejexasanif.pdfIn PDF document text
    • http://boribasumagit.epizy.com/fugorosoxigojifosis.pdfIn PDF document text
    • http://zajunevoza.epizy.com/detox_diet_side_effects_skin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 2076 bytes
SHA-256: fa4790484f290998440724486edfc3cc77717fed40b397cac257d4b5a9b7e434
font_01_sfnt_off0001138f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138F 5476 bytes
SHA-256: b317524f2977cac3a66f871353d666c49f74c9f2d74e5afff755c0d870fd33eb
font_02_sfnt_off0001260e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260E 11476 bytes
SHA-256: 17282d8d43ee51e5fe884e647e8819b991ca0252d5da324b687830ab36e80e54

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