Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c93a85e2994f0ca…

MALICIOUS

PDF

75.1 KB Created: 2021-05-21 01:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d6db8a95ca03da7f8cf3a34f222c1768 SHA-1: 5c1403ad44ce02a01441884aa53315069d839e61 SHA-256: 7c93a85e2994f0ca288f12571ab9c2b8a934508cb7ec74ec9bed0ee467ab4b0e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one pointing to a suspicious URL (lozipotod.ru) that is likely used for phishing or malware distribution. The presence of numerous links suggests a link farm or a mechanism to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=gestalt+therapy+techniques+topdog+underdog PDF link annotation
    • https://rufuwoja.weebly.com/uploads/1/3/4/7/134735928/d63da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495390/normal_60378f74dd21a.pdfIn PDF document text
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/zonivesebim-xivibujowemipuv-wapazupelug-bukibufelof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_60443e7983fe3.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/7261848.pdfIn PDF document text
    • https://jexiliwole.weebly.com/uploads/1/3/0/7/130739190/4787216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458826/normal_60435bd7b39a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_602f17db33375.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/divikufifir/bes_m12mi-_psc40b-_s04g_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6554a7-178b-42b5-ade3-a5b877054291/are_costco_kirkland_hearing_aids_good.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/dufovusul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0529a82-1e95-4db9-b231-ba72dfa9c4f4/oster_food_processor_ratings.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/58530351669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcaf268f-f667-470e-8ddd-6981126b9b02/lidegiderapuxanuros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28dbd8ce-654a-4d1a-9761-667c6cc92a45/final_fantasy_7_remake_report_15.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/83860087233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51dde03-56c8-4b5e-9abb-e3be2b00bcc5/wisdom_sits_in_places_chapter_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471c1460-d958-4d5b-80e7-3c7789a416a1/glacier_bay_toilet_dual_flush_valve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84dffb6d-e212-4f35-8117-ad59fbd75ff8/welcome_to_the_monkey_house_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e69e13d-2ce2-40b9-8ac7-062deaa2ed5a/graco_snugride_click_connect_30_infant_car_seat_nyc_black.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/49066375991.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://en.wikipedia.org/wiki/Fritz_PerlsIn 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_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 5592 bytes
SHA-256: 715848d0c013f379ebc92852a420a11e17245601c6acff6f8f0f7678eee02bbf
font_01_sfnt_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 10248 bytes
SHA-256: d2c184a66ce150f5d2c9a821a12ab93c59915302dcdbf187acbad7378c7f8ed2

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