Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff7fe27dd32af51…

MALICIOUS

PDF

68.7 KB Created: 2021-02-08 08:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3d543b67559a845699bdedf9bdaa4593 SHA-1: f374dae945b3f35ecfe118cfe4b8463ba436f07a SHA-256: 7ff7fe27dd32af519aa42c6648a840b602900e9325864f5d837aaed73cc23d3f
184 Risk Score

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
  • 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 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/aws?utm_term=app+cleaner+apkpure In PDF document text
    • https://butilitari.weebly.com/uploads/1/3/3/9/133997497/3df7472a48f4a38.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/bigixozuz.pdfIn PDF document text
    • https://dosemawa.weebly.com/uploads/1/3/5/3/135388865/dalimedonugalebik.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/5380895.pdfIn PDF document text
    • http://catsism.com/anet_a8_configuration._hf18ln.pdfIn PDF document text
    • http://requiredjokblog.com/anatomy_and_physiology_tortora_bookv0315.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/3063370.pdfIn PDF document text
    • https://pusasosabuni.weebly.com/uploads/1/3/4/6/134654602/852d1.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/23032e22183f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_6015c15c2da86.pdfIn PDF document text
    • http://kamaz-ftc.com/xefusugufof2k58j.pdfIn PDF document text
    • https://mafaredoli.weebly.com/uploads/1/3/2/6/132695491/abcd94d9dd3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokimutopilar.epizy.com/extinct_animals_dodo_information.pdfIn PDF document text
    • http://jigabez.epizy.com/cellink_biox_manual.pdfIn PDF document text
    • http://zujewutaze.epizy.com/73038248483.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_off0000d34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34B 4804 bytes
SHA-256: 8074e5615c7454e0a26ec858f02501aec38863c2691672b4ac9cd73edf485e70
font_01_sfnt_off0000e3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B4 10176 bytes
SHA-256: e4e8ff1ca6de0e3b48f301985402fcb9decb44509793934319e37f86a9033fbb