Malicious PDF — malware analysis report

Static analysis result for SHA-256 f343121c77cfcb38…

MALICIOUS

PDF

74.9 KB Created: 2021-02-21 08:07:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5ab47a63aebfce44344910ac1af3cc65 SHA-1: 3d70961692f158da61a1aee75c4d956a2d7fbe24 SHA-256: f343121c77cfcb38c502d7a92bdbba082711eef7f3326dc983f37f9b0de10ab0
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 0.9998

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://baarspo.ru/strik?utm_term=franz+kafka+metamorphosis+existentialism PDF link annotation
    • https://cdn.sqhk.co/tisufupujeli/T5sm4hg/56171257428.pdfIn PDF document text
    • https://nuluziberalisox.weebly.com/uploads/1/3/1/3/131379655/2612d7af3.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/iiQjcVr/blue_bottle_coffee_nyc_jobs.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/2042787.pdfIn PDF document text
    • http://remont-kholodilnikov.website/hide_and_seek_download_pc8x37t.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/41160414a21fc40.pdfIn PDF document text
    • https://cdn.sqhk.co/zoturisa/knhgrgc/3126998544.pdfIn PDF document text
    • https://cdn.sqhk.co/bajafigotuvi/vMl4igj/singing_machine_studio_karaoke_system_reviews.pdfIn PDF document text
    • http://damita.fun/historical_romance_fiction_heterosexuality_and_performativityhuwsi.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/fsLugeR/22954967296.pdfIn PDF document text
    • http://lojisaka.22web.org/part_time_graphic_design_jobs_atlanta.pdfIn PDF document text
    • http://wuzotevoxed.22web.org/balance_sheet_answer_key.pdfIn PDF document text
    • http://armada.technology/kegelizawuvimowobokvd.pdfIn PDF document text
    • http://relax35.ru/riverside_golf_range_nottinghampmlkt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujulerika.epizy.com/bisagegipefij.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/internship_training_plan_template.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_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 5276 bytes
SHA-256: f4bd4e2062dfbb670d6dd08989aa37b968627c8183e3443b0920546bfa2bbecb
font_01_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 10028 bytes
SHA-256: 507926ef80fadbbd883e2539f4face537fa56880944865787f0f9edf34fa39a7

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