Malicious PDF — malware analysis report

Static analysis result for SHA-256 778eee8ea5d9e261…

MALICIOUS

PDF

63.0 KB Created: 2021-02-08 16:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 65a502c56fedc8ea4003b55eb0c825a7 SHA-1: acbb381c01769b29e455a76c3e0d9ade3d5a7dd8 SHA-256: 778eee8ea5d9e2615323872dd93ecc6a4477f72f5f6764fe089539b2f2ecc00a
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=appvn+apk+free++apkpure In PDF document text
    • https://static.s123-cdn-static.com/uploads/4456378/normal_6008cf8730131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476418/normal_5fc819065540d.pdfIn PDF document text
    • https://tevufipe.weebly.com/uploads/1/3/1/6/131606546/vazevugakigepav-defisetagovax-zusapa-lojinuw.pdfIn PDF document text
    • https://divozurov.weebly.com/uploads/1/3/1/4/131437474/sipoxavu-gaparigederote-fixupevipik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_600d9dc5bf226.pdfIn PDF document text
    • https://lovelutunaguj.weebly.com/uploads/1/3/4/7/134735325/6165917.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/gamudipab-majosumawijoro-jemimifeg.pdfIn PDF document text
    • https://wuwiragirek.weebly.com/uploads/1/3/0/8/130874366/wezovovemu.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/6420a65adcb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sejekaxupoze.epizy.com/4028711627.pdfIn PDF document text
    • http://dutagewenurodub.epizy.com/porujogofan.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/wutosebilekexamesi.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/tivikojulazijunegexikexes.pdfIn PDF document text
    • http://xapulena.epizy.com/popuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/68047004599.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_off0000bafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFD 4800 bytes
SHA-256: 8bca2be9964c619ca9e67c1fe2c7199b29fa9900a70401b27cc4bca3c822a83a
font_01_sfnt_off0000cb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB70 11196 bytes
SHA-256: 318911cd4c1ea7f556e71159536fea4981e3c89d2f81e5bf681fde39c37cda65