Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ae269bf86c368f…

MALICIOUS

PDF

72.3 KB Created: 2021-06-08 22:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9b25e9cd2b071162740dc1746669fe1e SHA-1: e0e432f59f29444eb69e83e108184f8b1357e56f SHA-256: a0ae269bf86c368fd199a1cf4fbb0352faf5ccf64bbdb3edd8b191c678c6c314
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to 'Whatsapp update in jio phone', indicating a lure to trick users into clicking malicious links. The presence of numerous PDF links and a link farm heuristic points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://gimoguvi.ru/123?utm_term=whatsapp+update+in+jio+phone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474979/normal_6056019911a53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490757/normal_5fc8dd0bc7d13.pdfIn PDF document text
    • https://bufasadapigeze.weebly.com/uploads/1/3/4/3/134307931/sogabafuvabuz.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/2179807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478398/normal_6004a1f2add80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403406/normal_5fffbdf380dbc.pdfIn PDF document text
    • https://zefipomez.weebly.com/uploads/1/3/4/8/134882075/zevuwelu.pdfIn PDF document text
    • https://fudamugifotud.weebly.com/uploads/1/3/5/3/135323440/e60a0330ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478133/normal_601b8a5b69d66.pdfIn PDF document text
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/37f950ac.pdfIn PDF document text
    • https://wozalaro.weebly.com/uploads/1/3/4/3/134326714/bokigobevevo.pdfIn PDF document text
    • https://judunuxazivu.weebly.com/uploads/1/3/1/4/131453245/sasureta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujirafamena.pbworks.com/f/latobasu.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144517101/61777245489.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/63800106926.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/w/file/fetch/144433059/18354650959.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/tofejusirexoleguba.pdfIn PDF document text
    • http://jevibufile.pbworks.com/w/file/fetch/144627027/can_procreate_export_to_vector.pdfIn PDF document text
    • http://jukozatixul.pbworks.com/f/stanislavski_method_acting_book.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_off0000dce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE2 5008 bytes
SHA-256: d57db4ffcbf7d254bdf96443301db0efd362a206a18404f24e3b12916f7d4dbe
font_01_sfnt_off0000ee00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE00 11228 bytes
SHA-256: 82bc994345ce2185d2c416b3890652147bcdaa329adf4b4919531801f7a26da6

Open this report in the interactive analyzer, or submit your own file for analysis.