Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0aee30d9f0a5e5…

MALICIOUS

PDF

70.9 KB Created: 2021-03-10 17:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6bc1f23bc5213cc88e248e619fd61ede SHA-1: 4a6859154184cd7a0619748c1ba9a1bb024863dd SHA-256: 8c0aee30d9f0a5e5801ec88ec9e0fb81dfd932ce9faa8150ac1ff1cc9e9d5ac9
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain metadata related to its creation, further supporting its role as a lure.

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 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://dugedepap.ru/award?keyword=representation+theory+and+complex+geometry+pdf PDF link annotation
    • http://risonubokedoxav.scienceontheweb.net/sap_wm_configuration_tcodes.pdfIn PDF document text
    • http://tevojagi.iblogger.org/nuwaxukomexokogojowano.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/why_did_mary_shelley_write_frankenstein.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/1518312.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486346/normal_603b1809d17a9.pdfIn PDF document text
    • http://fepotarugagi.22web.org/how_to_build_a_wood_splitter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_6048951e8c470.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/what_is_via_character_strengths.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/how_do_you_punctuate_with_quotation_marks.pdfIn PDF document text
    • http://maxigafa.22web.org/vanished_left_behind_next_generation_online_castellano.pdfIn PDF document text
    • https://tuminiride.weebly.com/uploads/1/3/1/6/131637714/robazifefur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofeparulofiz.rf.gd/sanyo_tv_wont_turn_on_red_light_flashing.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_58b77a18320940efb2903fcec42516c8.pdf?index=trueIn PDF document text
    • http://bubalafugevale.rf.gd/76280877955.pdfIn PDF document text
    • http://nufudojor.epizy.com/kaduwutewad.pdfIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_9443428550584f17a5883422e162fc5a.pdf?index=trueIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_1cfe5e2e162c45fd98293766403e7cfa.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_off0000d7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D0 5744 bytes
SHA-256: 2b60ae7676b55be81b52a5977b7eb776bcd01d905ed58e3dd54265d2d3006e08
font_01_sfnt_off0000eb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB50 10188 bytes
SHA-256: 230942ee1d67ec8e62b777903656a05d6d9838293c10d20ceed6cfc26dea1255

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