Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2948e96c50827ab…

MALICIOUS

PDF

79.8 KB Created: 2021-03-18 02:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 24b02b9d452b91edd8bfff5d8b4c8ff3 SHA-1: 1773b5753e04b6265a14a1e6977a4476843b07f2 SHA-256: f2948e96c50827ab24fcf6c78b389c12c7fabd94cd5a83862378fac902bfa86f
186 Risk Score

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 0.9990

Heuristics 6

  • 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 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.
  • 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://pelibifir.ru/wix?keyword=learning+tree+school+fee PDF link annotation
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/vebokexepa_sebomitor.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/fujuzupugalajirumadumap.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/ac5sFjc/baduvovofibubunutawor.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/mekidexudetoro_josewupanadi.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/4816476.pdfIn PDF document text
    • https://rigabobavotul.weebly.com/uploads/1/3/1/8/131856161/fekir-juxode.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/is_washington_dc_open_for_travel.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/9035223.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/ieBhfha/japanese_fighting_stars.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/V6haIhd/75229099011.pdfIn PDF document text
    • https://wajabanafeku.weebly.com/uploads/1/3/4/5/134599300/dojudot.pdfIn PDF document text
    • https://debivozujorebol.weebly.com/uploads/1/3/0/8/130813616/7e91043fc.pdfIn PDF document text
    • https://fizutijerenom.weebly.com/uploads/1/3/5/3/135391470/7237671.pdfIn PDF document text
    • https://sefomaxezaniv.weebly.com/uploads/1/3/1/4/131483109/gijaj.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/igeigie/kizup.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/nfpa_1410_drill_4.pdfIn PDF document text
    • https://wigikeketiru.weebly.com/uploads/1/3/1/4/131406435/xepupawef.pdfIn PDF document text
    • https://cdn.sqhk.co/nikofilexi/iicDFXb/79131038160.pdfIn PDF document text
    • http://fetoxuk.mywebcommunity.org/schneider_electric_altistart_48.pdfIn PDF document text
    • https://zurozudosumo.weebly.com/uploads/1/3/4/7/134719863/livafexosigukegalena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/applescript_do_shell_script_zsh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d2c926-1b09-4907-965c-aa413b6eaca5/which_brand_of_robot_vacuum_is_the_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c1023a-a3ae-45cf-9230-9b6a8adaab9a/where_is_page_number_format_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8503973-c591-4bb4-a451-388c100411cd/galinijobu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 5084 bytes
SHA-256: 3c312c65c3911e0f0fe5d55e349ae2ca1289b48f45cfeef602076273ea10e675
font_01_sfnt_off0000f5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CC 10864 bytes
SHA-256: d30c733c2b9a86a27aa14cb291ad620c11587b5c9deb42827304352c2a8e142e
font_02_sfnt_off00011b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B10 16100 bytes
SHA-256: e8be64a599b4775abf69106d1ea2a605297721d8ccc8071fb3d67c702b09cfa6