Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd50564d636da255…

MALICIOUS

PDF

77.4 KB Created: 2021-02-26 04:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d59b39cd3a5b22fa6148a21522c6682d SHA-1: d178554adba6ea6f72c2110af249119b197f5973 SHA-256: cd50564d636da2551bff84e5a4ec9e23e3caaf89a4d1c7d86dd696122e232233
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=safety+siren+pro+series+3+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491671/normal_5ff58d07ae1c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409239/normal_600735ad615a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529149/normal_5fec4e0419202.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepedamaxa/s8gdgdS/popirasux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446944/normal_5ff657737eda5.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/gfjeGid/parents_kit_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_602c5aa2ea43d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_6026ddedb8605.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/dubtgiX/hd_camera_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/gVXJODf/call_of_duty_mobile_garena_pc_emulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5fdba2934c85e.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/3755174733.pdfIn PDF document text
    • https://winapusumebut.weebly.com/uploads/1/3/4/6/134695108/kipuxusarapex-jisaz-bisude.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455894/normal_5ff419c309731.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477401/normal_5fdfc59ec9ade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449627/normal_5ff75ebc59c6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454803/normal_5fe55b510fc61.pdfIn PDF document text
    • http://radongasdetectorreviews.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fajazimigig.atwebpages.com/najuxaludej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 5416 bytes
SHA-256: 3c5ee8dfb9103ad98807e79ec2f347d2a88a110856e362f68fd5f51d66242de8
font_01_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 10756 bytes
SHA-256: 2bc0811c1e4e96a1cf282968bffa2031391d0c6c6d87e3ad92f08f935463198a

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