Malicious PDF — malware analysis report

Static analysis result for SHA-256 6037b7a23fb5d379…

MALICIOUS

PDF

80.9 KB Created: 2021-05-19 19:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: da519b30c4c28cca9c8b247b727c930e SHA-1: f4e814c8734097b40796d4c311d7e32e287780d1 SHA-256: 6037b7a23fb5d3796c62e74ab2745d79ec8324f200215696144b7d5cd13bab64
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. One prominent URL, 'https://xajibur.ru/strik?utm_term=chimera+tool+premium+crack+2020+%2526+activation+key+full+free+download', suggests a lure related to software cracks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://xajibur.ru/strik?utm_term=chimera+tool+premium+crack+2020+%2526+activation+key+full+free+download PDF link annotation
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/1291213.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_5ff088659ae5b.pdfIn PDF document text
    • https://gubojipupulep.weebly.com/uploads/1/3/4/3/134359502/d84da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_603f2ae346ba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_6037144bbe35a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_60117dd24e3f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_5fe9cb0e9731f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489733/normal_5ff47e4756154.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://s3.amazonaws.com/viboxikuz/programming_clicker_garage_door_opener_keypad.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/ti_nspire_calculator_case.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/lejot.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/79922871687.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/58372542252.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/stihl_ms170_carb_service_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6771ba5-3fb7-4731-975c-bcebd862e67b/what_is_the_second_step_in_the_decision-making_process_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f17c1aa-c93d-48c8-a509-72a212472d04/lincoln_pro_mig_140_welder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76405859-da5b-4ea2-b03d-0edbfcabd8e2/xenalekisa.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/web_design_typography_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/78695961809.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_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 5132 bytes
SHA-256: c3138b3b99796cf6e8db7b9a281a8c7a0e31234a6779a6a4d261412cad6d9e96
font_01_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 13040 bytes
SHA-256: 843556fd8b0b384cd89ffa4b92321ef72f1885a7070cf2f4b63b39ff19b073cb
font_02_sfnt_off0001263f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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