Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf66eec8245a484…

MALICIOUS

PDF

73.4 KB Created: 2021-03-14 02:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0c3fd5fb7feeccd822bf77b11fe6de1 SHA-1: 966ee74d7e14b3540fbb69def05b23ce6f866dc9 SHA-256: bbf66eec8245a484473319e24125ca50038c55f1cd64cf15225d962929828309
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 0.9997

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://jacksth.ru/award?keyword=bnf+pdf+free+download+2020 PDF link annotation
    • http://femokotafi.66ghz.com/latiwarowelekevanepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_fb37accc93204904b5f09ad3effb2d8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75673cd-5cdc-407d-921d-e63c7490d526/jevudetukimobapa.pdfIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_e934f9276f1b475889dc233115f7ef89.pdf?index=trueIn PDF document text
    • http://kapejod.rf.gd/nafagazuzofoburekivamirow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a819e9c1-c512-4e95-8b06-f645615b665b/bitetapagupofejojemunemo.pdfIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_cbc5d4dad2d34264b9e0f6a39646badb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0cfac16-8acc-4c51-8f96-fc394fdaae72/cuanto_es_7_gramos_de_cafe_en_cucharadas.pdfIn PDF document text
    • http://mirokuf.rf.gd/gudotarifibenubix.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/17320699362.pdfIn PDF document text
    • http://bivadalov.epizy.com/jifeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/97737132205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4185648-4418-4fb7-9d36-fc32d520fa73/tom_clancy_ghost_recon_breakpoint_update_1.08.pdfIn PDF document text
    • http://gogolozumer.epizy.com/computer_course_certificate_template_free.pdfIn PDF document text
    • http://suzusufiwavel.rf.gd/87822585912.pdfIn PDF document text
    • http://wasaxotudulolo.epizy.com/nice_guidelines_for_fluid_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/the_economist_july_20_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/28102274029.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/meaning_of_vocational_training.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/vagekibibapodusidara.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_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 5272 bytes
SHA-256: 3c2c4312c5f71cf98783a0ea3b0dec1c14bd5bcdbec9cc57e30f956bd7532e75
font_01_sfnt_off0000f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 11948 bytes
SHA-256: 10b0de3ce3236b7aa07084649d8f948700916d08a75ebe8e02e729a202940313

Open this report in the interactive analyzer, or submit your own file for analysis.