Malicious PDF — malware analysis report

Static analysis result for SHA-256 2170b833a26684f3…

MALICIOUS

PDF

79.1 KB Created: 2021-03-29 18:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ee85fe040c57e92e00e4288b934e9b8 SHA-1: 7023e906f2d4711e9a60561fa8dfe9a9297cb764 SHA-256: 2170b833a26684f353564c08deb98bdbf056f3d726f091ba91d99c58e66b24f1
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 0.9995

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://jumiwimov.ru/123?utm_term=free+child+adirondack+chair+plans+pdf PDF link annotation
    • http://zunuruxeguxifi.mygamesonline.org/20123565125.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/multiple_case_study_design.pdfIn PDF document text
    • http://e-sparks.ru/how_does_the_soil_texture_triangle_worklhg90.pdfIn PDF document text
    • http://simcars.ru/schlage_be469nx_user_manual1qtnm.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/0SMejaA/validity_in_experimental_research.pdfIn PDF document text
    • http://normaa-id.com/316177901515v6su.pdfIn PDF document text
    • http://kamini33.ru/mitorafn5vi0.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/eeUU9td/rukofoluma.pdfIn PDF document text
    • http://ketosimple.online/reported_speech_in_spanish_exercisescjik9.pdfIn PDF document text
    • http://italiahot.space/jk_haru_wa_isekai2fmbr.pdfIn PDF document text
    • http://bupro.asia/936603818575n07y.pdfIn PDF document text
    • http://immortal-sho.club/hfsa_2018_guidelines00ik2.pdfIn PDF document text
    • http://wow50.pro/avatharam_2019_songs_isaiminiux1zg.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/bAgeMij/jijofagom.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/j1YHUJV/jewipixo.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/Hiihh3Y/bakamatofemipiv.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/6gfihhb/fejenogufel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fokavugepiromi.epizy.com/acknowledgement_of_paternity_texas.pdfIn PDF document text
    • http://pobiludorigogok.epizy.com/bixozefonufejediwipitolok.pdfIn PDF document text
    • http://gitakatad.epizy.com/sentence_fragment_worksheets_high_school_with_answers.pdfIn PDF document text
    • http://vetanafajodomek.epizy.com/dimensionality_reduction_machine_learning.pdfIn PDF document text
    • http://dobaferuw.epizy.com/39973684611.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_off0000eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 4968 bytes
SHA-256: 6f84cd19ca8d75b52945fd498b11028fda2153c5dd1084dae3655585054c84f9
font_01_sfnt_off0000fb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 10948 bytes
SHA-256: f62465251e3cbf6920e3b4c10001a41c8d080a718104584df335c5a2f127370d
font_02_sfnt_off000120ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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