Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c2831a44483802…

MALICIOUS

PDF

78.8 KB Created: 2021-02-27 04:21:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 103b25d1c9c740047e200465ffe8bba9 SHA-1: 53b0bf4248b85db6c676bb0c2f71d18c271f5073 SHA-256: 25c2831a444838027791b9bfd0fb6f4e6411a3e9085e4896785843eb6b0c1f6f
96 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with the primary one being https://vilenefex.ru/123?utm_term=what+do+calisthenics+do+for+your+body. ClamAV detection and ML classification indicate maliciousness, consistent with a phishing attempt. Although no scripts were explicitly extracted, the presence of embedded URIs and the PDF structure suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/123?utm_term=what+do+calisthenics+do+for+your+body
    • https://bumiwawewa.weebly.com/uploads/1/3/5/3/135343946/a769dcfe9.pdf
    • https://nasovakuj.weebly.com/uploads/1/3/2/3/132303133/b39ef2f4082.pdf
    • http://creditpm.com/nukabizijugomumujgjjrt.pdf
    • https://lomobesozav.weebly.com/uploads/1/3/0/7/130774973/5e508e751656.pdf
    • https://cdn-cms.f-static.net/uploads/4393508/normal_600a3d19d5128.pdf
    • http://help-verifiedbadgecenter.com/google_maps_satellite_view_out_of_datef5v8v.pdf
    • https://cdn-cms.f-static.net/uploads/4386091/normal_60386b986448b.pdf
    • https://static.s123-cdn-static.com/uploads/4486521/normal_5fca79db2ae3e.pdf
    • https://cdn.sqhk.co/kokojisip/qhdhiQK/negemegazovejakifebom.pdf
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/8228587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dikomavomem/15730999972.pdf
    • https://s3.amazonaws.com/ganubifirigevi/skyrim_creation_club_content.pdf
    • http://wakoxoxotof.epizy.com/85517773963.pdf
    • http://sanobinam.rf.gd/what_network_do_doro_phones_use.pdf
    • https://s3.amazonaws.com/roxawo/google_sheets_permanent_text_wrap.pdf
    • https://s3.amazonaws.com/suxugipipolazog/what_does_seeing_333_mean_in_love.pdf
    • http://vuxawov.rf.gd/galaxy_grand_prime_pro_full_specification.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d8.bin
ba180117224060e70add81ec6e223d242f2d5d16b3e52feaac435770c0087010
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D8 5364 bytes
font_01_sfnt_off00010a25.bin
bbde9549d88f09a2be938aaa5b23a0541498870e238549e347412f6d44cf2248
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A25 10408 bytes