Malicious PDF — malware analysis report

Static analysis result for SHA-256 11470f43e74b8910…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 15:14:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bbf9f93c63c7dafb27df3e97f0c9ec0b SHA-1: d7e374dd6e0461e0428e01689e56852ea77c4f11 SHA-256: 11470f43e74b8910a21dd19a380d7d82c6b13a0bf5e0bfb2cd6bcba432e5cabd
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/strik?utm_term=which+of+the+following+is+a+foul+ball+in+softball PDF link annotation
    • http://livethailand.fun/belofixuzavogivitor35xw.pdfIn PDF document text
    • http://mignonette.space/gezifokro01c.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://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_1b3d1b615cd84b9b81276ab361eef271.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sewamos/mabukozonudisoluk.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/ember_js_guides.pdfIn PDF document text
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_7ae18e7aadec44ffb2fb2d0164de9c1d.pdf?index=trueIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_9464ad67369a431b8d8b5de09c224b16.pdf?index=trueIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_cad11471cb9c41b5b4ae18db7ea4a615.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/message_to_garcia_criticism.pdfIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_630ab05e7a284bec99ee3aaaf8056500.pdf?index=trueIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_7cc43f1758e74badb1d7f5ed5d610912.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5676838-9249-4666-ba70-e3d4f4f8d879/liwuxiranekedovafo.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/crown_xti_2000_power_amplifier.pdfIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_fa5af1e0ee3048caa7c600026647e981.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/android_auto_2._9apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/dipubujida.pdfIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_a419f205159b4beeb82f3980cb1d63a2.pdf?index=trueIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_0905453b0cbb4a119647e6e1b2ce946f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c00834-795f-40bc-9b7a-d65987cc9e87/11726255303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54acc21e-014c-4c5d-8cbc-46bc53a9216e/how_to_replace_oral_b_triumph_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/amberley_state_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/concept_of_sustainable_national_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca20b279-865c-4086-94a6-ccb7a72c93b9/long_run_total_cost_function_formula.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_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 5176 bytes
SHA-256: 1abd5468a15de57e19612ba4c0a9f3e120612029d765c3235359a1e9928bd245
font_01_sfnt_off00010129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 10484 bytes
SHA-256: 7251c24190a54445f2abf74b19fd64f04d55e0782c1e828f467a36ade3c036a9
font_02_sfnt_off00012529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12529 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34