Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2ee02a579b4205…

MALICIOUS

PDF

78.9 KB Created: 2021-04-03 05:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6ca7831a90a12b1bd627f4715f193224 SHA-1: e0bb860e18f1580d402b99b5e38b663a6ec2566a SHA-256: 9f2ee02a579b42054ab439502c9b4eaae9727560dd909cde1ad25976b66b2186
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm and a ClamAV detection for a phishing trojan. The embedded URLs suggest an attempt to direct users to external resources, potentially for malicious purposes. While no scripts were explicitly extracted, the nature of the link farm and the ML classification indicate a high likelihood of malicious intent, possibly involving phishing or the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/123?utm_term=actuadores+electricos+y+electronicos+pdf PDF link annotation
    • http://poxumanavofeboz.scienceontheweb.net/walarokex.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/present_continuous_tense_examples.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/saturated_steam_temperature_table.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_d69a54f86c5a442d869300e588ff9f59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mukutud/64832067965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0566bc5f-c730-41b5-8596-1cfb90f1932b/govawonenonogusinuwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/bass_guitar_chords_chart_for_4_string.pdfIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/asme_bpvc_section_viii_free_download.pdfIn PDF document text
    • http://zininorenedalo.onlinewebshop.net/75124085498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d5f55c-dd6a-42c1-8afd-692fa720a14c/22503602086.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/gone_with_the_wind_cast_members_still_alive.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_6bccdd73e6ee43eba8e9aeb9090ae911.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sikuva/62173757266.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/41407414615.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/kugewalelilaletevaka.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/solid_state_physics_books.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_ab884ded5106445ea533af0b5795ae6b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01351a1d-aa88-4c9f-90b9-0a6d583d8cdb/chronicles_of_narnia_characters_names.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/is_the_foundation_trilogy_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c85d1d-6776-495f-b4ab-03f41e234d31/fakutimijiziboxelonudaji.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/breast_milk_glands_anatomy.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/la_gua_completa_de_ingls_bsico_janet_gerber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d0b2be-471c-412f-a2c4-b80b91a3fb30/95971954637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275749d6-07fe-4c89-900b-393481d089fe/different_types_of_electrical_wiring_materials.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_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 5240 bytes
SHA-256: 6e13fa18b5c1829cd434a1866b772df3e75dcd4df9aa9d646809934e4260aff9
font_01_sfnt_off00010782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10782 11288 bytes
SHA-256: 26bff09c7deff45745203be624a2a7b4cf43b90a1b495f190edebdca8ef4faf2

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