Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afc4476e9eaaf02…

MALICIOUS

PDF

83.2 KB Created: 2021-04-08 19:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8dbd530625470d61a47ca482401066d0 SHA-1: 2817d651ddb148c7eddc2409408c70852af75ee5 SHA-256: 4afc4476e9eaaf0289a893d34efa03e9820657517f3e679d6b858535cee72cbd
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'Titan 440 airless sprayer'. The primary malicious indicator is the embedded URI pointing to 'https://bologen.ru/strik?utm_term=titan+440+airless+sprayer', which is likely used to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the presence of external URIs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/strik?utm_term=titan+440+airless+sprayer PDF link annotation
    • http://shoop-ft.ru/certificate_of_origin_vietnam_form_bbh4xu.pdfIn PDF document text
    • https://cdn.sqhk.co/wujodazera/Lj7gjjf/kutaxemepuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_60395d12dd9e9.pdfIn PDF document text
    • https://cdn.sqhk.co/nupopobax/AgdQIhf/88091732753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474445/normal_5ff9ca2c27938.pdfIn PDF document text
    • https://cdn.sqhk.co/wifilivemij/iaa0Yha/21786354827.pdfIn PDF document text
    • http://mebelrostov.ru/what_is_the_difference_between_nitecore_i4_and_d4jy2fk.pdfIn PDF document text
    • https://cdn.sqhk.co/matejedu/hcjdaje/80724496990.pdfIn PDF document text
    • https://cdn.sqhk.co/sexobivobufo/j25jaFi/duetto_pizza_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/hbNggyd/quiz_buzzer_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigizakeku/gcSIidh/cnc_machinist_jobs_in_pearland_tx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496815/normal_604f382815fc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471479/normal_60434e3167315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_601b8b50d54e0.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.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/337e1cf9-2cea-42a3-b153-aa7899cc06a8/what_should_your_child_be_doing_at_24_months.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada9ee1b-bb81-461f-ae4c-65e157c90ace/the_ransom_of_red_chief_analysis_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/78339766953.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/me_after_you_paul_kim_ost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab4fae4-8b52-465f-8320-aa254761a70b/10808154903.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/dokunegoru.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/pedufozofefunej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6667483e-ed99-40f8-8d37-397f192e7a0f/7490108174.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/first_aid_booklet_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9548e172-ad67-443a-9e1a-c441b9128961/35842284081.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_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 5096 bytes
SHA-256: a59b08d52356157601bd7d759b93fc73ca388ad46b17a6c1fcc305c5b302c9fa
font_01_sfnt_off000115da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DA 12180 bytes
SHA-256: 682142aa1b70b00a16636d2c4cdebb4bf25dc85dbe05313cc4ba787077dabb12

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