Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39ae64fc7d6871a…

MALICIOUS

PDF

100.4 KB Created: 2020-12-23 02:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 83b9651793e70d343bb8235396d6e466 SHA-1: 74062c68cf08246dac0dcdc67b7ce430fa39cd95 SHA-256: a39ae64fc7d6871a293ea37c2109c07a0733c5a97d16f8f61e59bbdfcbb27da4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a 'hashshiny bitcoin cloud mining apk'. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. The PDF structure and embedded links are indicative of a link farm used to distribute malicious content, likely an APK disguised as a resume or mining tool.

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 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://traffnew.ru/strik?utm_term=hashshiny+bitcoin+cloud+mining+apk PDF link annotation
    • https://mixarilimapi.weebly.com/uploads/1/3/4/6/134677364/cba969b972358.pdfIn PDF document text
    • https://vunakeba.weebly.com/uploads/1/3/4/6/134623580/7203728.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/80acd7ec-d13f-4c55-917f-08ae33889902/full_stack_developer_resume_objective.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61cbf1e9-6a9f-451f-9c4a-b4cc7d414f5d/48675667713.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3205912facd59cebb7138/t/5fd10e3b2aef7644cc585efd/1607536188691/tag_photos_iphone_ios_13.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe04b055b7bc96605619f00/t/5fe06788f3f88b619f3b65ae/1608542089258/rimworld_ice_sheet_1._0.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe271a95ddc597cb220ed83/t/5fe27534db99a37e4eea689c/1608676663317/xakevupapivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb16be75-c2fd-4137-b6eb-1f4fe385ea0c/does_coca_cola_hire_ex_felons.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d18a7848ba205d31d661/t/5fced97924ae147ef3cd685f/1607391610969/sejidunisijowasobolevate.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdeda6dded0f7041aa80ea/t/5fcf88ba0496d067bdd6bafb/1607436481538/coronavirus_daily_briefing_sunday_10th_may.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce315af1fc5b0afda8f2f3/t/5fd70276226e9048facd7470/1607926390900/wagelazik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733114ad-85b7-460e-af1a-f8530ace3470/elektron_analog_rytm_mkii_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3e9edabee7b44068d2c/1606218730471/skyrim_forsaken_cave_glitch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c8fe58-8b0e-43c8-b6ff-f59592836821/wuruzujelake.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a9ecf7cf8c75403636cc/t/5fca939c25df3404b63bd2c3/1607111581246/zomef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ecd805-074a-4354-a1dc-42c0dd0fa4d5/fowavobuvolej.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_off00014984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14984 5660 bytes
SHA-256: 06cd5b94b8677bd8835c9e4556c8a6b3c86150d2506e6c50065a5c597dc6059f
font_01_sfnt_off00015c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C9D 11616 bytes
SHA-256: 369963b81337ae2032fac19c0fd369ad0f905552b32dbd42f2762a39ab2efbf2

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