Malicious PDF — malware analysis report

Static analysis result for SHA-256 192242db343e605c…

MALICIOUS

PDF

82.7 KB Created: 2021-05-02 21:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2c7325f54a7b0b8f5cef5418ffc3cc9e SHA-1: dc3182e1697d478fce5874e13e2c64a4a83b32bb SHA-256: 192242db343e605c0068056968187d0fdcab3e4bb8b5caede9071cf2ccc1b56e
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The presence of a link farm on disposable hosting further suggests malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://midufefew.ru/strik?utm_term=the+second+great+awakening+was+a+response+to+which+theological+persuasion PDF link annotation
    • http://tifeguga.22web.org/lenuvoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454429/normal_600b029014bf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_600071e236795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_6054ab2883036.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/CzjbSja/at_t_mobile_transfer_app_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_603eae772a4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453338/normal_603fb6ddc9020.pdfIn PDF document text
    • https://cdn.sqhk.co/tozerutiwezu/fmjj0jg/tuzir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mukokulag.epizy.com/xerolevikotefirup.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_6d86a4bdd56d49be964f482f1520a199.pdf?index=trueIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_6489f5f94a3a42bbb7411ec73f159ce8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luborinizu/vikobome.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/gigegukilerapumazibu.pdfIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_ddfc1d22ace7454da53a3f8fe3464b0a.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_d5a981cea17147efa042449f56f2e178.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/best_80s_breakdance_songs.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_04f455edc5284dd99e6de911d54e3a44.pdf?index=trueIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_e81b2d2d3cc14da1ab35ea768aa6cd0c.pdf?index=trueIn PDF document text
    • http://lisokabosexipep.epizy.com/the_ecology_of_plants_second_edition.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_c6bf1a0971bb44ff8d0280d5ac47c76f.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_272cea6cb88646f9a682e6387342b842.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 5440 bytes
SHA-256: c460dec502a430c2519f0e3595e93b0704510b398264243294460b9913fbcf20
font_01_sfnt_off0000fd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD63 12452 bytes
SHA-256: 6584b3feafbf9461676ff3cf19c548d47251b99b3ac25d05cf4a832111c809b5
font_02_sfnt_off00012723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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