Malicious PDF — malware analysis report

Static analysis result for SHA-256 952af335e2a7998c…

MALICIOUS

PDF

75.1 KB Created: 2021-02-22 16:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50777598e9a442b98f577208f9b56538 SHA-1: d82b1029899350abf8fa4c6fb84faf16d9e57ddd SHA-256: 952af335e2a7998cc550c508bb1e7c6c9e3d5a64f2b00deddde77dc248f9a8e9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract traffic. The embedded URL and the document body's reference to 'ps3 jailbreak' indicate a phishing or scam attempt. The ClamAV detection and ML classifier further confirm its malicious nature, likely as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=ps3+jailbreak+4.70+cfw+download+free
    • https://cdn.sqhk.co/pobopuwubox/cT9hd8h/nakawepa.pdf
    • https://cdn.sqhk.co/mugegiduveb/uajcohb/lofogozebepemimemigibinik.pdf
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/xipodudase-ludomibo-zonatelovuz.pdf
    • https://cdn.sqhk.co/kixituvelil/ySgegf9/tavoxenogederusar.pdf
    • http://fevozogu.iblogger.org/berixojobitibadug.pdf
    • https://cdn.sqhk.co/famuxina/JElhfie/2426894759.pdf
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/fatopulukemu_negositera.pdf
    • https://sadusobagobazep.weebly.com/uploads/1/3/0/7/130776682/5ef286af8c.pdf
    • https://static.s123-cdn-static.com/uploads/4460706/normal_6007fb4f45b42.pdf
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/9299787.pdf
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fd2e74730506.pdf
    • https://cdn-cms.f-static.net/uploads/4402737/normal_5fd80b3e34b0e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zewimu/fesafipugunerig.pdf
    • http://kidogip.epizy.com/what_is_a_word_for_feeling_good.pdf
    • http://boxitevu.rf.gd/soranotosujot.pdf
    • http://rowavironipomiz.epizy.com/lowuzopixegizaj.pdf
    • http://xabofaveretezu.rf.gd/tonopukamugi.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/how_does_sba_define_full_time_employee.pdf
    • https://s3.amazonaws.com/wiwuxot/calligraphy_worksheets_for_free.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_off0000e6b6.bin
50ed2daba67478e34cdc8de0a1103a9aa8958f190526ccdc52c418d9cc85f4f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 5896 bytes
font_01_sfnt_off0000fafa.bin
b469cd150044077d294b92bdd2a6c1241f3f9fa384dc140efdcb9df597a95a13
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 10544 bytes