Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1ed6bbf8e14159…

MALICIOUS

PDF

70.7 KB Created: 2021-04-05 07:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6126db7536f394da7c27867141e06c62 SHA-1: f5c342989e4119f9df3f630180bee8dae7d73e13 SHA-256: 0a1ed6bbf8e141594d51580dfbd449e0a3dbd64a98ab93e4b987fd9e9283b482
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple unknown URLs strongly indicate malicious intent. While no scripts were directly extracted, the structure and heuristics point towards a phishing lure designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://nipisod.ru/aws?utm_term=microsoft+excel+projects+for+high+school+students PDF link annotation
    • https://cdn.sqhk.co/marelagixe/SgfkgiC/pofejotanosefu.pdfIn PDF document text
    • https://cdn.sqhk.co/givinonu/EigcQGn/hungry_shark_evolution_mod_apk_unlimited_health.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/jidgcjf/bupabirivatarud.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/eAiaWgd/xovosuvupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464722/normal_601387d145e60.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/jePFQ7D/vewagesefivogikijatavopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_6056a71747715.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/sosupejuxofedo/gtx_970_vs_1650.pdfIn PDF document text
    • https://def05634-b969-4265-beeb-1e7d695e9a44.filesusr.com/ugd/6865ce_c4214c0d8fa841ffbc49960c7b93af43.pdf?index=trueIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_476211b98e804adf831651b704f73b68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazovugal/72271969547.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/vidilidizusuri.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/how_to_interpret_pls_regression_results.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/the_ministers_black_veil_what_is_the_setting_of_the_story.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/batodiwomifuma.pdfIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_496afcddb9b54883901c47bc09548b04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/tofixizaxivi.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/uppababy_mesa_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/jenegepevasebazabepi.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_fe7c27b1550f4f15a9ae4fc79ba6b22e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EF 5356 bytes
SHA-256: d450c5ab8b9aa52143221580a2956d8a0e90887f8c90df3a3e95573bae52bba4
font_01_sfnt_off0000e940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE940 10624 bytes
SHA-256: e64d8fc1fabebddc9d6b0fef5368b2db1ee49fbab622a7f76e5cd1edae9568a3

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