Malicious PDF — malware analysis report

Static analysis result for SHA-256 969f0c7dc579cce7…

MALICIOUS

PDF

77.7 KB Created: 2021-04-18 23:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a79deca4db0d46a2504942a9f916c2d SHA-1: b01735f65b427ab88f9e5fae207dee9be038cb1d SHA-256: 969f0c7dc579cce75cbd986299187200a69ced6604fbc8e8ca4656503204c16b
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating it hosts a large number of external links. One of these links, 'https://fokemale.ru/strik?utm_term=how+often+to+do+interval+training+running', is identified as a potential malicious URL. The document body, though heavily obfuscated, suggests a theme related to 'interval training running'. The presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=how+often+to+do+interval+training+running
    • http://turamebupef.22web.org/o_alienista_em_quadrinhos.pdf
    • http://bimoluk.iblogger.org/16469501946.pdf
    • http://fasafumataluxu.iblogger.org/dufopebodo.pdf
    • http://tojenan.iblogger.org/matlab_cdf_from.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jufofokisib.epizy.com/12572381037.pdf
    • http://jojovezelel.rf.gd/cross_hatch_adhesion_test_astm_d3359.pdf
    • https://uploads.strikinglycdn.com/files/0b0a7cd0-621d-4a81-8573-28b6f88c4efb/element_tv_problems_turning_on.pdf
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_ab89169fde814cd5af970d17d70b982c.pdf?index=true
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_b4662919dfea4ea3bb97724dad093004.pdf?index=true
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_be4a013923354b9e9aa4349750d512f5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ec2d6d3-833a-4489-827e-de57586227c1/8088531221.pdf
    • https://uploads.strikinglycdn.com/files/a55ea3af-ba5a-4e9f-993d-d5cca9e82063/what_is_the_meaning_behind_the_handmaids_tale.pdf
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_d3180e0f3bb14dfb97c348d3e0072631.pdf?index=true
    • http://zezevefo.rf.gd/benepewaxilokometat.pdf
    • https://uploads.strikinglycdn.com/files/e0808453-e88c-4aa3-9bd3-efb45bf8950e/27471440310.pdf
    • https://f8206d31-21c4-4aef-9da9-e4259ded718a.filesusr.com/ugd/c2bdac_8c568379dbaa468cb3ea9d3beea838eb.pdf?index=true
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_cd883258881c46b7a23f42381b688c50.pdf?index=true
    • https://uploads.strikinglycdn.com/files/076ddc25-2532-489a-9efd-2212a94d22df/singer_heavy_duty_sewing_machine_bobbin_threading.pdf
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_6454b9d20d6b449c8174b6f3f3a60d12.pdf?index=true
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_9711ca6a86c4466dab65f8e370b12213.pdf?index=true
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_5eac372f9a574ca6960a1ba701165667.pdf?index=true
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_dfa7d86a0ba64107b0002ea3d19ffd2d.pdf?index=true
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_c8e7022be4e0462585e737e648e8007e.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f329.bin
6547ac3242b812252f67c61190eb0932b832891337c7cd6bd7e03b6d6b9ea314		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 5012 bytes
font_01_sfnt_off0001045d.bin
84e9b7568acf57730d784d343a5b3585f2029c6856def3d7ae108c2717342147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 10784 bytes

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