Malicious PDF — malware analysis report

Static analysis result for SHA-256 0914f863fa3d5b71…

MALICIOUS

PDF

99.1 KB Created: 2021-05-28 14:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b3c6cb8aa408a7b503ad6773c1641e77 SHA-1: 3f2d24183c18f92d2a2f16332e86f6e123365ec7 SHA-256: 0914f863fa3d5b71d962395f30f183807475544e32ea9ae9e538c50f3a2d7279
96 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 indicating phishing and trojan characteristics. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to relate to the URL's apparent theme of a 'milling speed feed calculator'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://jottigo.ru/strik?utm_term=milling+speed+feed+calculator+metric PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4427093/normal_60b023017534c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_5fd9782b92f8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413126/normal_5ff3e9e00dd65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_6039ed5fc80c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_600fd14e67a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_6017d68d54d04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_6065e4cb80534.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/0152cfa6-0260-4801-ac27-c2672769b49c/alinco_dx-sr8t_mars_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed991809-c088-4a39-bba7-67dbbd509592/woperuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999a64f6-8a26-44d7-8c34-6e591c8c8558/adventures_of_tom_sawyer_summary_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2a4bba-a298-407d-9f3d-014064477cb7/81870514454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db27c556-7973-4211-8ae9-085cb31a9011/cleaning_instructions_for_keurig_mini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7956d2b-ddaf-4345-997b-f2007045b88b/real_book_song_index.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38d8960-16a5-4dfd-9125-e4f14b611556/new_4.3_l_mercruiser_engine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5286191e-6922-40a1-90c5-17c64df3642f/tidusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/055df2c2-7976-4583-8d3a-0d1048047724/gramatica_en_espanol_para_nios_a1_a2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4fca37-f236-4700-b215-407a660bc83d/43360477380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24bfe5c-ba4f-435d-ac57-cc686ca70b82/fawubebobogefeveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2834c1d-eb6b-435c-83d5-9c731d9e1678/zakikapuxezexusux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b165cb1-ff02-467c-b233-8da7f8b498c3/sawixufixifetadirofoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe731ddf-c226-401c-80a4-a3dde2fe23b2/35981365210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca13e683-516b-4cd5-9181-cbd474721a73/mr._coffee_12-cup_programmable_coffee_maker_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038e2856-13f6-4408-b194-5895fb223101/hypertonic_hypotonic_isotonic_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df261241-3b3b-4b2b-90f4-ab5b97e07da7/pegifuki.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA2 5480 bytes
SHA-256: 94ce6369fe6445046ee6cb29576ea9759fb546da270d1d2054f7b803ab9f93b2
font_01_sfnt_off00014146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14146 11908 bytes
SHA-256: c88f7753573715717927aa709d9bf1676cf22787ae4dac2e140f294791242ad3
font_02_sfnt_off00016981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16981 16112 bytes
SHA-256: 116e1aefc1bdc9fdbdc8bc4ca32ed8fc2a9096b6ae60b76e258fcc2d5524df3d