Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d2ba7c16e508a8…

MALICIOUS

PDF

40.9 KB Authoring application: Serif PagePlus
MD5: fff3fc92df394371a494ea753ecdab3d SHA-1: 208ae4360e7b48e9933d2f510225125b053aec89 SHA-256: 72d2ba7c16e508a80ea46a5721405d6e43151f05dae004d8b277c462cf675c40
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://sisstar289.com/uploads/1/3/0/5/130551971/8770014.pdf
    • http://debndaveswedding.com/uploads/1/3/0/6/130603860/rimotusi.pdf
    • http://friendsoftheyaa.org/uploads/1/3/0/5/130540009/6cbf70a7d.pdf
    • http://savianflaviusdesigns.com/uploads/1/3/0/5/130588596/54d8f475eea6a1b.pdf
    • http://amazon-sellers-check.com/uploads/2020/01/28/9003461.pdf
    • http://wingingitarts.com/uploads/1/3/0/6/130604874/firotuwoz-nexezoraninarav-lowoxowunezijin.pdf
    • http://christianambulancenetwork.com/uploads/1/3/0/7/130740199/130740199.html#finis+mundi+laura+gallego+audiolibro
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000114a.bin
dc8b8f829863f99af8dd36f4c6c0066786fcfafb5387843151f8d9dd47a42a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114A 8848 bytes
font_01_sfnt_off000045d5.bin
af9eb9b730649cc741304f36dbf542a4bb318eceaae22f9c84f3d31ea36d929b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45D5 9372 bytes
font_02_sfnt_off0000627c.bin
e76d935c97f1554219c1e487298768ee724c087acafc55e2193a3c378a4d1dd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627C 2600 bytes

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