Malicious PDF — malware analysis report

Static analysis result for SHA-256 6beeb3dcbb4c8071…

MALICIOUS

PDF

81.1 KB Created: 2021-03-19 17:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3db276194bd640d791d1d5d894ea3ab2 SHA-1: 98be3cdf8c965621000cb668803961a52d573f23 SHA-256: 6beeb3dcbb4c8071f96bb80035972582da0d9677b9946d97b4589b345f0841b2
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 0.9993

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://baarspo.ru/123?utm_term=belated+happy+birthday+images PDF link annotation
    • http://ezfix.asia/girl_gone_cold_after_first_date4qyqp.pdfIn PDF document text
    • http://mydenverneighborhoods.com/doodle_army_boot_camp_full_version_apk_free_downloadnvv6p.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/a1cXjiN/economist_magazine_online_login.pdfIn PDF document text
    • http://acupofjacob.com/37461143790oxl51.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/go2rifI/lightroom_6_vs_lightroom_classic_cc.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/xirewor39q3d.pdfIn PDF document text
    • http://about-central.com/xefidadowowoguleda2dyxl.pdfIn PDF document text
    • http://2220202.ru/bhoot_wala_game_karna_haifhmri.pdfIn PDF document text
    • http://naturaitalia.space/an_astrologers_day_textqeel1.pdfIn PDF document text
    • https://cdn.sqhk.co/dovewobojeb/bhjuiiq/retro_arcade_machine_x_games.pdfIn PDF document text
    • http://velesvoyage.ru/fraction_to_decimal_long_division_worksheetbvgbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/automatic_car_driving_tutorial.pdfIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_e44e3363bfc449669a0c168e1a757680.pdf?index=trueIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_e5520a476f584bf6ab4fa5cb580bcf4e.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_ca39bca1f40a483faa4e4a20e3218e95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/piruziledopovinuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/yamaha_mg24_14fx_review.pdfIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_e4315d660127427ba9c584f458291a5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/jomowe.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/emi_aneroid_sphygmomanometer_manual_blood_pressure_cuff.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/refotuferobar.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/47317768497.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/why_does_my_netflix_say_error_30103.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_off0000fd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD74 5664 bytes
SHA-256: b1608b50c1146afde8676829df391927f89ec4044e83e78a796d046110c6f516
font_01_sfnt_off0001108c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108C 11420 bytes
SHA-256: 0a2c221f7716d4b6e7f095ba994b0651930722edd1cc7056150a584f9a9113dc

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