Malicious PDF — malware analysis report

Static analysis result for SHA-256 3776963a32d9ec5a…

MALICIOUS

PDF

43.1 KB Authoring application: LibreOffice Draw
MD5: cc50144b4214c5f8d271c16fa05c034f SHA-1: 89bdfd154a7e5441b4a79ba7b07b8393e180413d SHA-256: 3776963a32d9ec5a6c415150a9474ae5bbb48e8d77ab90f7e00de5dbd2d105d9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This technique, identified by the PDF_SEO_LINK_FARM heuristic, is commonly used to distribute phishing content or redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely part of a phishing or traffic-robot campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://noyirionworks.com/uploads/1/3/0/4/130483820/5889648.pdf
    • http://askwiseguys.com/uploads/1/3/0/2/130270873/2686355.pdf
    • http://meroveo-upower.store/uploads/1/3/0/5/130551754/baxovomoxaba.pdf
    • http://bricomcorp.com/uploads/1/3/0/3/130313632/sexotetavefij.pdf
    • http://www.enviadeguatemala.com.gt/uploads/1/3/0/5/130545885/zobavawugu.pdf
    • http://andrewspickert.com/uploads/1/3/0/7/130739082/43a4869da72.pdf
    • http://modish716.com/uploads/1/3/0/4/130490451/4235913.pdf
    • http://stavrias.com/uploads/1/3/0/2/130270869/43b3fee868003d.pdf
    • http://clarkhighschool79.com/uploads/1/3/0/2/130289363/wefojuganewupi.pdf
    • http://dracoshairco.com/uploads/1/3/0/8/130814845/95725afc9ef.pdf
    • http://changethefield.com/uploads/1/3/0/3/130379741/6471853.pdf
    • http://fargondrestoration.com/uploads/1/3/0/2/130289493/riwetini-bodoji.pdf
    • http://refinance.mortgage/uploads/1/3/0/7/130776233/7a116.pdf
    • http://hostmaster.referrerflow.co.uk/uploads/1/3/0/6/130621020/tanunofamaronovu.pdf
    • http://fitness-private.com/uploads/1/3/0/5/130543575/fikinubevenut-xuzemutegekuvun-fofiv.pdf
    • http://lockworkzlocksmith.com/uploads/1/3/0/4/130483426/5be8c480393.pdf
    • http://duneassoc.com/uploads/1/3/0/3/130323249/nodixejukerelekawi.pdf
    • http://provincialgrandlodge.co.za/uploads/1/3/0/3/130313091/bilalosofexe.pdf
    • http://helmuthandsonsconstruction.com/uploads/1/3/0/7/130739598/lupogegivined_mosoxorijo_kivatifa.pdf
    • http://qacloud8.com/uploads/1/3/0/5/130539309/130539309.html#typhoid+vaccine+in+infants
    • http://andrewspickert.com/uploads/1/3/0/7/13073908

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032da.bin
98958365168029d4f54c753cd9186d92cfe6c3bbbc0f7ce7585e6a5e6ab2bca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32DA 16040 bytes
font_01_sfnt_off00004a27.bin
c67590e6ee5d27bd74d2b9c34b0260385ca69c1d239f9a4a72fa95105b6ad36c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A27 7956 bytes

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