Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7161ad30a786dc3…

MALICIOUS

PDF

69.9 KB Created: 2021-06-04 04:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aa6ebf028b45265dd3c9f5f3aaf2432 SHA-1: 7698a196e3e50687522bb61dd8df4118ef9761e3 SHA-256: c7161ad30a786dc39f656e7ec3044c03ed64c72ea2b6486684cb28b8d2f9572f
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or directing users to malicious sites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack involving password-protected archives. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://garglob.ru/pbw?utm_term=miracle+box+crack+start+button+error
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/3ae4f3395610.pdf
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5fd6e0ea14a93.pdf
    • https://cdn-cms.f-static.net/uploads/4413570/normal_605b972e1b4a5.pdf
    • https://cdn-cms.f-static.net/uploads/4386837/normal_60205caa2e01e.pdf
    • https://cdn-cms.f-static.net/uploads/4384046/normal_604462e545c79.pdf
    • https://xizotikozuza.weebly.com/uploads/1/3/4/5/134587863/tirezizipofi-borefa-venekovika.pdf
    • https://cdn-cms.f-static.net/uploads/4365659/normal_60310957a9598.pdf
    • https://static.s123-cdn-static-d.com/uploads/4469355/normal_60b0048e0b8e8.pdf
    • https://vejefoxebeses.weebly.com/uploads/1/3/4/8/134860837/lowozetuner.pdf
    • https://static.s123-cdn-static.com/uploads/4375352/normal_5ff3f442cdad0.pdf
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5fd8d73edddfa.pdf
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5ff0ba0bb2351.pdf
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fd6404aae7e9.pdf
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fca327ece8b9.pdf
    • https://daworotiboxega.weebly.com/uploads/1/3/0/7/130775949/4db25065d.pdf
    • https://bogezemobazuv.weebly.com/uploads/1/3/1/8/131856224/5a0acfe.pdf
    • https://cdn-cms.f-static.net/uploads/4450244/normal_602ad8cf578fd.pdf
    • https://cdn-cms.f-static.net/uploads/4368492/normal_605c38c78d87b.pdf
    • https://cdn-cms.f-static.net/uploads/4481418/normal_600fcd8e21e6e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://juvupumanut.pbworks.com/f/zovuxu.pdf
    • http://tisowowuduwe.pbworks.com/f/50276853168.pdf
    • http://lulatigono.pbworks.com/w/file/fetch/144542229/battlelands_royale_mod_apk_unlimited_money_new_version.pdf
    • http://junerew.pbworks.com/f/what_is_spn_4364_fmi_18.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_off0000d5a6.bin
0953b45e97b5883e704276796495005330b347622acdbb883af505d8e8215455		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A6 5072 bytes
font_01_sfnt_off0000e6fc.bin
fc24183aec815b5254697289e5c1846aff8781f4b6ef5a1f50e853214d1faefe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 10248 bytes

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