Malicious PDF — malware analysis report

Static analysis result for SHA-256 91122573b956e5e2…

MALICIOUS

PDF

58.2 KB Created: 2020-11-17 10:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 260c2d2a52b21509a2ff1b701089ffc9 SHA-1: d59b04bf69bd2c5f5ef3ffa8b06c260c55b0ec74 SHA-256: 91122573b956e5e20d58df4c466080a490b60751dc6d640b8e268b482cc6dcf6
196 Risk Score

Malware Insights

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

The PDF contains a link farm and is flagged by ClamAV as a phishing trojan. The document body, though obfuscated, suggests a lure related to 'zynga poker hack ios'. The presence of multiple external links, including one to 'trafficel.ru', indicates an attempt to redirect the user to malicious content or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?utm_term=zynga+poker+hack+ios
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5f8dcfad46196.pdf
    • https://cdn-cms.f-static.net/uploads/4498992/normal_5fad483b89eaa.pdf
    • https://cdn-cms.f-static.net/uploads/4443356/normal_5fb332d10f2de.pdf
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/zajaga.pdf
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8d5d6961913.pdf
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f8e84cc3ef69.pdf
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/faguraxezas.pdf
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5f94ec089cfca.pdf
    • https://cdn-cms.f-static.net/uploads/4448547/normal_5fa3ac66c3eba.pdf
    • https://cdn-cms.f-static.net/uploads/4476150/normal_5fad709d65e91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zugutixe/bernard_lewis.pdf
    • https://s3.amazonaws.com/fewifuwu/windows_8_pro_activation_without_key_kms.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_off0000a854.bin
2ced392b6b870480f404d98b115ef691947403ebcd8fb998b71003cb08135c9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA854 5284 bytes
font_01_sfnt_off0000ba5f.bin
79a4cb4de77943b88ca965e52887b86b20c224dce1734c0e7369614c191ced1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5F 9972 bytes