Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8662f71de2bd0f…

MALICIOUS

PDF

72.6 KB Created: 2021-01-11 10:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 214b1bb633f399813b2ba24443f08cee SHA-1: 8e911285fae829e9e90d13be0f40238890afa4db SHA-256: ce8662f71de2bd0fb2ee197c2c3ce8f1ee7af819167f03b5f5e6397f2740f9bc
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the 'Play store app stuck' text in the document body indicate a lure to potentially malicious websites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafficel.ru/aws?utm_term=play+store+app++stuck PDF link annotation
    • https://xoludebule.weebly.com/uploads/1/3/4/5/134526363/jafuwulo_lobulenuruwu_jexupafapozine_fadoxuxanug.pdfIn PDF document text
    • https://site-1178312.mozfiles.com/files/1178312/street_fighter_iv_mod_apk_data.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f9cb47c4793e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5fda645b26412.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417318/normal_5fc3e2f89b579.pdfIn PDF document text
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/5071849.pdfIn PDF document text
    • https://site-1174218.mozfiles.com/files/1174218/maloxoxisogapuv.pdfIn PDF document text
    • https://site-1176856.mozfiles.com/files/1176856/bigejozabid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386618/normal_5ff7ef4059a6e.pdfIn PDF document text
    • https://figagukedeliv.weebly.com/uploads/1/3/4/0/134040575/8e169f645662ebb.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/ragejufa/davis_park_ferry_schedule_patchogue_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/2592564749.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/45666050711.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/soxifovoxak.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_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 5096 bytes
SHA-256: fb56bc3af6b564fae5527cb28218a9aed56226652725910b7ca272afa2b28165
font_01_sfnt_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 10064 bytes
SHA-256: baa7f964fe693f38b494b0d26f560a6e89a4c7c82bc1e0fa520a66717b2a12d2

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