Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60ae94a631ab4bc…

MALICIOUS

PDF

80.9 KB Created: 2021-03-16 17:15:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83cafe5ad17f16985b9f04568653dc5 SHA-1: bc81f2461ed83e8dd9259da4bd51133ef008df97 SHA-256: b60ae94a631ab4bc683b1bce0d7dce65ce32f60e5ec3fdf998b54f2b1f4bf9e6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to manipulate search results. The primary URL, 'https://soxebez.ru/wix?keyword=malayalam+kambi+katha+pdf+free+download', indicates a lure for users searching for specific content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=malayalam+kambi+katha+pdf+free+download
    • http://wixujikubipom.mygamesonline.org/jotusebe.pdf
    • https://xifatame.weebly.com/uploads/1/3/5/3/135316237/sifoze-pisuwarib.pdf
    • https://fugopezawisobib.weebly.com/uploads/1/3/1/3/131383650/d15f4983.pdf
    • https://punizino.weebly.com/uploads/1/3/4/3/134327780/5660919.pdf
    • http://zokidinodajives.getenjoyment.net/visadikiwonusazitibonu.pdf
    • https://dupafubakatato.weebly.com/uploads/1/3/5/9/135961249/7209056.pdf
    • https://cdn-cms.f-static.net/uploads/4490121/normal_600f03be8acd1.pdf
    • http://nitapida.mywebcommunity.org/gelipepikolorer.pdf
    • http://kidufamipowanot.mywebcommunity.org/free_subject_and_predicate_worksheets_for_3rd_grade.pdf
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5ff4a37cacdc0.pdf
    • https://cdn-cms.f-static.net/uploads/4454668/normal_6012bf0866b0e.pdf
    • http://mekapidi.medianewsonline.com/rukonemujef.pdf
    • https://midunaso.weebly.com/uploads/1/3/4/6/134680252/bbf0981d27d42b1.pdf
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a98373f1-84d8-4961-aff1-320b257e114b/traductor_ingles_espaol_con_audio_pronunciacion_escrita.pdf
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_4819c006a1cc4abea75f01746d91dd24.pdf?index=true
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_6f1ab82a73aa45f1bf783abccb2a90e6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9b2ffc4e-c12f-4264-96bb-0893047d88ee/when_time_is_good_quotes.pdf
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_672941c92c684c289605342bfc20ccd1.pdf?index=true
    • http://nununad.myartsonline.com/saitek_x52_hotas_flight_control_system_joystick_pc.pdf
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_b6954d746bed490e9f13b3f57f881fef.pdf?index=true
    • http://jokosen.atwebpages.com/pentair_intelliflo_variable_speed_pump_troubleshooting.pdf
    • https://uploads.strikinglycdn.com/files/7bf312c2-6793-4044-8085-4f0d7030e261/what_is_the_sephiroth_tree.pdf
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_df6ead89c5e94e488af4f381b356c99d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e23af2c0-1f1e-499f-a940-ada4e25cfbd3/eureka_airspeed_exact_pet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f711.bin
f85635cc6ee0107e7dff6ecc635eb1cbcb6b2c73ef5ebc03d61873dd16665e3b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF711 6872 bytes
font_00_sfnt_off0000e469.bin
6391aa024c4431f0868785f024d95021f7a1dccbe2ebb427a348fe754f4d17ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 5508 bytes
font_02_sfnt_off00010f38.bin
7a531a7588833ed6951306b783c582eb1d8452d66ebc7d439e1571976d1b7096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F38 11332 bytes

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