Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cca2765e2eda489…

MALICIOUS

PDF

85.8 KB Created: 2021-06-10 05:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6479907e929a68d012af0baf118d9d8 SHA-1: ab435d50f199ae35fd95f3ac1cb2b04d90f06495 SHA-256: 0cca2765e2eda489899ce5653826e0f97f7aa4576ae5ee074943fce625f8550a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7608

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://crysiq.ru/pbw?utm_term=picture+film+quiz+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393181/normal_6028203a3e13c.pdfIn PDF document text
    • https://jiwefirufij.weebly.com/uploads/1/3/4/3/134370204/2015747.pdfIn PDF document text
    • https://bevafanuti.weebly.com/uploads/1/3/4/5/134525906/2226760.pdfIn PDF document text
    • https://neruzubegakakew.weebly.com/uploads/1/3/4/0/134017499/gajazofum_metekadulinaj_pababinokasuji_wafira.pdfIn PDF document text
    • https://jiritoravusona.weebly.com/uploads/1/3/4/3/134371650/rolasotado_zufitem.pdfIn PDF document text
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/9b97988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5fd328bbc6894.pdfIn PDF document text
    • https://guvisine.weebly.com/uploads/1/3/4/5/134598756/4237977.pdfIn PDF document text
    • https://xudixakutax.weebly.com/uploads/1/3/0/7/130776611/54adb51d345f3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97475501-4982-44d1-913b-ee4ea2de3245/shaolin_kung_fu_forms.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144620097/temufevuperuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a321a1a-4a0a-43e3-9201-bd5fe1b197ce/64265416762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd8fe983-a1ad-48b8-9fbf-29f011a2cb35/56389896025.pdfIn PDF document text
    • http://veputuvus.pbworks.com/w/file/fetch/144757332/mikemis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14ed541-ed8e-4268-956e-6b07c3fe8a9e/bisugukinikagizomusafased.pdfIn PDF document text
    • http://suniger.pbworks.com/w/file/fetch/144701376/rori_raye_modern_siren_free_download.pdfIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144472491/how_to_unlock_advantium_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b0e758-142b-4c01-afbb-9fd9d91e8381/xexiforuxisanarikinodabi.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144426882/bolokubukawiroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3aa2381-ca08-438b-825d-4cb5d432be41/doll_houses_for_sale_melbourne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87da78b8-97da-4793-9b0d-ef36f406bf37/dyson_dc44_animal_cordless_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303ed872-247e-4f85-9ef0-bc71dbdf2e77/are_lazy_boy_recliners_any_good.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12603 5388 bytes
SHA-256: 9b71637f5cbbd15e4a19f1714d427f4fdba3b5b7feb7758ae59d2145e5711a9e

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