Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e55a9575fa74c02…

MALICIOUS

PDF

51.0 KB Authoring application: LibreOffice Draw
MD5: 14fca7781ac0e5757d53e445878463f5 SHA-1: 82149a395607a43ee73a962378c5b9e7252115fd SHA-256: 7e55a9575fa74c0268a7f7800979ed55e155add960b9d3df165deb9e39f3e33e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The primary malicious URL identified is http://whackyposts.com/uploads/1/3/0/7/130776428/xazefedunadesata.pdf. This suggests a phishing or SEO poisoning attack designed to redirect users to potentially harmful content. The ML classifier and ClamAV detection further support the malicious nature of this file.

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://whackyposts.com/uploads/1/3/0/7/130776428/xazefedunadesata.pdf
    • http://nciba.weebly.com/uploads/1/3/0/6/130604733/637829.pdf
    • http://ccocciboutique.com/uploads/1/3/0/6/130639889/d6241621efc0.pdf
    • http://sallysfitnessfortress.com/uploads/1/3/0/4/130477040/sakokaru-wezubu-womud.pdf
    • https://buduzuxosot.weebly.com/uploads/1/3/0/4/130475925/ac17a7cfb35fba9.pdf
    • http://rulawusu.getthedriver.com/uploads/2020/01/29/peked.pdf
    • http://paddleboardz.com/uploads/1/3/0/3/130323092/pukirutor.pdf
    • http://panc.afaparents.org/uploads/1/3/0/3/130313013/patiweli.pdf
    • http://incamamas.com/uploads/1/3/0/5/130544703/xuwobixobon_favumapedobuxu.pdf
    • http://koshercorner.org/uploads/1/3/0/3/130379409/rodeviwot_lapikato_worexuzaw_gunososedeve.pdf
    • http://allergy.mediutopia.com/uploads/1/3/0/6/130620572/130620572.html#bottle+shoot+3d+game+apk

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00007368.bin
7ad586bba81ce67ecbca8ca8b7d1bce3417f4c1a6bc6c837bba4fbd3eb43a616		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7368 20884 bytes
font_00_sfnt_off000012be.bin
301d732323d18510519e69348bacd7b8a23f6a2875a01ccb942bcae0df2a3e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE 8748 bytes
font_01_sfnt_off0000574e.bin
b4e29a4940746ec53f3d4a3ce6ee1a3372929169f99809f349084aa4504cb9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574E 10064 bytes

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