Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f444d65024e1cf…

MALICIOUS

PDF

81.6 KB Created: 2021-03-11 19:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 804eda6a5481b15fc453f81a784afd6c SHA-1: 1feb36a73ae50e1916afe25298098e2906ad9802 SHA-256: 78f444d65024e1cf6520bd7cabd9603f678855110a052b8d61edd6e280b4b841
186 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. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The primary URL observed is related to a search query for 'Cinderella full story pdf', indicating a lure to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/award?keyword=cinderella+full+story+pdf PDF link annotation
    • https://cdn.sqhk.co/xejulonejo/VKghFwg/secure_settings_plugin_for_tasker.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/ipldgig/zombie_hunter_sniper_apocalypse_shooting_games_hile.pdfIn PDF document text
    • https://cdn.sqhk.co/gokitoser/gh7gi2y/chronological_order_of_the_bible_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/Zjhfegf/modern_sofas_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/d8hdrhe/lg_health_physicians_neurology_lancaster_pa.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/Yhe2Xjc/olvidarse_de_alguien.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/Yggunha/tag_with_ryan_combo_panda_code.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/beats_studio_4_price.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/52110014765.pdfIn PDF document text
    • https://cdn.sqhk.co/zotevokep/iiYghhh/download_galaxy_battleship_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/adpi7cR/samsung_galaxy_s3_wallpaper_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/Dhf13fN/crashing_series_1_episode_1.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/hdlKjiO/98974978611.pdfIn PDF document text
    • https://cdn.sqhk.co/kulabokirow/idvgfOb/pegumekibepaxaxipop.pdfIn PDF document text
    • https://cdn.sqhk.co/wivenute/ieJu5Hr/64462395964.pdfIn PDF document text
    • http://lotukaguw.sportsontheweb.net/86459157349.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/hiiekhj/download_game_elite_killer_swat_mod_apk.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://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_063bdbf98fef4557b24fd4b76a4983df.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_ae29bce8475e419096f79f29da9b9ec6.pdf?index=trueIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_7806b169f20f44d69b005c8c4186014d.pdf?index=trueIn PDF document text
    • http://vekejuf.atwebpages.com/is_the_roku_2_still_supported.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_4af61d7576604a1d8648244b0a0f5a85.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_fec54ad4c81c41b0ac07ffde9a167811.pdf?index=trueIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_8d333d44587c47699f94599e87da7338.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_230396b296054665a72206fb745e8e3b.pdf?index=trueIn PDF document text
    • http://wonanikapudidak.atwebpages.com/17347469056.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_3a7a67eac57d425192723ad536d8abdb.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_4b37d2c5f76c4e489e27155691f2363b.pdf?index=trueIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_524343e9fc4a4c5a9956133fd64d6848.pdf?index=trueIn 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_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 5040 bytes
SHA-256: 48448978d43c232217f4aa53f6b7c9b8cd61b7e92bcfca25dec7914f95db6ce0
font_01_sfnt_off000103a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A8 11000 bytes
SHA-256: 6e3f23dd33b627dbd2ceea2679a7de1d90a54e28ac808a555b809a0f01fd9874
font_02_sfnt_off00012906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12906 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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