Malicious PDF — malware analysis report

Static analysis result for SHA-256 8072882a88bc1979…

MALICIOUS

PDF

72.2 KB Created: 2021-02-25 01:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f98e2e6db32945ea51ccd34449ef153f SHA-1: a9c733e165d0da5cf4f7827afa6d7d0a75a41c61 SHA-256: 8072882a88bc19795a94be2e92b30f796cd8a5f35a5db79aa793b5d4cf78fd11
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=cu%25C3%25A1nto+tiene+una+pulgada+en+cent%25C3%25ADmetros In PDF document text
    • https://cdn.sqhk.co/zolulesar/hQ8gigi/mdt_dca_app_download.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/15c34584c8f.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/emq18hi/muxiperavovadax.pdfIn PDF document text
    • http://craftsmansmetics.com/merikaxifekabalanamokur4c336.pdfIn PDF document text
    • http://pravagims.net/temiworumaxodofizefdjfxi.pdfIn PDF document text
    • http://energierecrute-emplois.com/15504739167kz9br.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/5911314.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/dglXRXc/97138863471.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/jhihcBk/warlords_of_new_york_ps4_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/hajaNhb/rozaza.pdfIn PDF document text
    • http://legendnat.space/hypokalemia_treatment_guidelines_pediatrics8di25.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/ZZgc3ja/top_up_flow.pdfIn PDF document text
    • https://nidetufuw.weebly.com/uploads/1/3/6/0/136097009/9166576.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/nilititonawafim/wufolaburodegalidub.pdfIn PDF document text
    • http://wonenuw.epizy.com/64998970260.pdfIn 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_off0000d983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD983 5588 bytes
SHA-256: c1b73a90a76c403581a287b3f0b56d05279eeb8af56baa0af5bed64aa13719a0
font_01_sfnt_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 11644 bytes
SHA-256: 0ad44123ddddc8baac805de41358b8a87a84e7cfed62268e55c39c6afe43aa5d

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