Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fc48da3aeadaf0…

MALICIOUS

PDF

72.8 KB Created: 2021-03-17 04:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d6e283ab49f6894de6f0ea758ee89be7 SHA-1: 40b58f02e9acd683f37d5b992a3edcbe72886b03 SHA-256: 29fc48da3aeadaf03b5ef3e2b5a6ce6388d06bae6a90a6a3959f276be35b64da
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and is described as a link farm. The primary URL, https://botokaw.ru/strik?utm_term=ancient+greek+homework+ideas+ks2, is likely the destination for a phishing or malware distribution attempt.

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://botokaw.ru/strik?utm_term=ancient+greek+homework+ideas+ks2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479921/normal_60184cea9e9e6.pdfIn PDF document text
    • https://limowidijepa.weebly.com/uploads/1/3/5/9/135992559/4970829.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/jrELsij/business_planner_template.pdfIn PDF document text
    • https://forerijekakifur.weebly.com/uploads/1/3/5/4/135401119/xexapamusavelujid.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/Jie9hau/datalax.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/bagebunoxevifa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470017/normal_5fe2ec6e6591d.pdfIn PDF document text
    • https://vizexetu.weebly.com/uploads/1/3/4/8/134864552/919942.pdfIn PDF document text
    • https://cdn.sqhk.co/xuteposidobi/fo7vjdI/ted_talks_2020_education.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/1IjfiiM/launcher_ios_14_apk_luutinh.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/zetituxitanu.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
    • https://uploads.strikinglycdn.com/files/9b63b5a2-8e87-4282-92c8-1f4860534fa1/57529138597.pdfIn PDF document text
    • http://magajavopisili.epizy.com/12202915328.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/android_10_update_for_samsung_phones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78eef40d-c178-4e61-83ff-ee62cfd353b2/what_happens_during_the_theme_development_part_of_an_interrogation.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/38457181093.pdfIn PDF document text
    • http://wubonaxe.epizy.com/roramusidamogo.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/blockchain_technology_in_supply_chain.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_off0000d207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD207 5384 bytes
SHA-256: d493e4ed3cc94d618cd9340b1b61ac50f2553cf5917353de338f2b0a1f74794b
font_01_sfnt_off0000e42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42A 10424 bytes
SHA-256: f4b28e316a5628a88f37c39caa98d407e47e0521eabb086aec7ad0d019cfe1c8
font_02_sfnt_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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