Malicious PDF — malware analysis report

Static analysis result for SHA-256 0582269f26933e41…

MALICIOUS

PDF

68.6 KB Created: 2021-04-01 00:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d031c898669f3513d7eee4b91195c81c SHA-1: 415eeb930dbce06b8c6eff46ed838179836c77d2 SHA-256: 0582269f26933e4155948f4a7c19beae316bd36e56b45403071f5c3890da7fc3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to `https://midufefew.ru/123?utm_term=egyptian+pyramids+worksheet+ks2`, suggesting a phishing or malware distribution lure. The PDF structure and the presence of external URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/123?utm_term=egyptian+pyramids+worksheet+ks2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425926/normal_60437c6261a7f.pdfIn PDF document text
    • https://katudiwuf.weebly.com/uploads/1/3/6/0/136006549/4716060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411250/normal_5fc93766e7dd1.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/a6261.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/28763576123.pdfIn PDF document text
    • http://hookup158.fun/sago_mini_babies_free_download8j53m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455195/normal_5fcdf86a07a2e.pdfIn PDF document text
    • http://g2am2e.xyz/how_to_play_the_guitar_for_beginners_step_by_stepqrte8.pdfIn PDF document text
    • http://vajejuzex.iblogger.org/sorewuzinokimimixomo.pdfIn PDF document text
    • http://ihsteam.ru/hero_xpulse_200_bs6_top_speedxxb0j.pdfIn PDF document text
    • https://loseseseveru.weebly.com/uploads/1/3/0/8/130813975/3c2ce3f028288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd4f374-9e3e-4afe-866a-6465b20996a0/pikogoxud.pdfIn PDF document text
    • http://weferobiditikun.epizy.com/list_of_irregular_adverbs_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ed2781-0ce8-4f06-98fc-2e81d01126a5/asus_z97-a_m.2_pcie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed77afd9-1f70-4524-bc9c-c797d326cac8/99495973221.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/siradaxonarobokobola.pdfIn PDF document text
    • http://tipumajusu.rf.gd/lomisivibaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/slider_revolution_templates_free.pdfIn PDF document text
    • http://soreras.epizy.com/free_able_budget_planner_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58af0c21-088e-4192-b17c-cd28eddeb4bf/romekutu.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_off0000ce35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE35 5688 bytes
SHA-256: b8805feb96ee8fd9344aa4e69084291aa7166cad75d4373fb2a43bede0a8e45f
font_01_sfnt_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 9920 bytes
SHA-256: baf0e84843f06ecb37c216188e051bd40480f9a0daf7f1d2d10130eb6d1c4f8b

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