Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d59b1fbdfb04c6c…

MALICIOUS

PDF

78.8 KB Created: 2021-06-06 14:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 68d68e72428d5a72260afd61e34c3b34 SHA-1: e7edb390a02a990de861f6141444bea7d7bcd5ca SHA-256: 5d59b1fbdfb04c6c6b307de50550c25b62137e6e6549873a058a0209abf4a3d0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous external links, a common tactic for SEO poisoning and phishing. The SE_CLICKFIX heuristic indicates the document likely instructs the user to execute a command, a known social engineering technique to bypass security measures. The primary malicious URL identified is ketchas.ru, which is likely used to host a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://ketchas.ru/pbw?utm_term=how+to+activate+my+webcam+on+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485004/normal_603373657041a.pdfIn PDF document text
    • https://xododasewa.weebly.com/uploads/1/3/4/6/134600374/pukurabulipizari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_6020c1bc826ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_6032152787059.pdfIn PDF document text
    • https://sirazetagur.weebly.com/uploads/1/3/5/3/135328448/a60eb9fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444357/normal_5fccd56d3cdeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_605a76a9cde07.pdfIn PDF document text
    • https://pejetoli.weebly.com/uploads/1/3/1/4/131454808/4a9d6ab117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_600355b732aeb.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/e1119519-c8ea-44dc-aedd-1f7cbcf14610/data_science_internship_jobs_in_bangalore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c1078e-e07b-49f8-80ac-7df8c191ae8d/74909802497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d561e5-6faa-4467-8628-b2f0b472a163/best_accessories_for_summoner_terraria_1.4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d89c2f-a40f-4717-83de-9ff858fcdf51/ordering_fractions_from_least_to_greatest_worksheet_for_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2181ad95-8023-4435-a9f8-4a9d2561af37/ping_pong_lessons_for_beginners_near_me_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3fda5c-586f-4a8a-a8a2-d10abb94096e/6457241176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ea3c75-c057-4404-a0b7-bb94c8daf64a/educational_psychologist_degree_distance_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd624112-42bf-4658-b049-dd304300e590/miele_fully_integrated_dishwasher_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7784efcc-64f0-4dd3-8283-56e78cf9bc68/dukufagajanepiwore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76013fc4-9e09-4a5c-802f-b4e22a4e2910/wotav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb20a41f-cf53-4b72-9d2c-e9b5f9ce3ef9/15266349229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a56f39-82a4-4afc-995d-04b6f8cbb47d/land_of_the_dead_full_movie_download_in_hindi_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276ba555-16cd-4b32-9b71-bfdd830c5200/30029046061.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_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 5292 bytes
SHA-256: e56a81ba9c113e21f6dd4133898c04c935a99cdfd835e954496a2a50decf46c4
font_01_sfnt_off0000fa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 10976 bytes
SHA-256: d9bd60551084ae4a7bc2d2974b39c88395e0a2c2ae00ec3059871d2589db43bb
font_02_sfnt_off00011f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3