Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f5e5c34a9896c9…

MALICIOUS

PDF

73.1 KB Created: 2021-02-24 23:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6530ed5dcaffa5d23d727bb56a122a2e SHA-1: cd98b94784b94a12230f993d0ae36246c1fe3f9a SHA-256: c2f5e5c34a9896c9d8d245ff9e23d2bd48bb239217d9bd0c415a53068c6369b8
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=the+plot+dot+pdf In PDF document text
    • https://gegivibubijob.weebly.com/uploads/1/3/4/5/134507206/0254d6701.pdfIn PDF document text
    • https://xemavuvewo.weebly.com/uploads/1/3/5/3/135394060/809848.pdfIn PDF document text
    • https://zediruli.weebly.com/uploads/1/3/4/7/134725524/6184736.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/lofefi_suwivixalu.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/rope_knots_for_mountain_climbing.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/what_is_analysis_and_design_in_civil_engineering.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/75319097261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fd0f66d07d42.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/rewifonemevizib.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/df6047c6.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/52f955ffaf.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/88926116616.pdfIn PDF document text
    • http://leledup.mypressonline.com/zufetaruvibezogajujitile.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/wavixorojebok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/persona_5_yusuke_social_link_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/lawn_maintenance_estimate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/enduring_power_of_attorney_template_act.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/17_day_diet_cycle_1_grocery_list.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/free_bible_commentary_download_for_android_mobile.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_off0000e4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AB 4592 bytes
SHA-256: b2aacaf76ce411392e4d3a0225b803b80d3be1021662557d2dce71d99204fd04
font_01_sfnt_off0000f44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44C 10264 bytes
SHA-256: 24a5e63f33d6cab982c807d91e9a58bbe7814b2fbbe809d0397cd5d86c7b8dad