Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fab0fc3b90ae657…

MALICIOUS

PDF

38.4 KB Authoring application: Scribus
MD5: a18aa8ef2b35afadd69a2d30030f75c3 SHA-1: a83fa9cb701963112c886a91a9c790d0bac0861d SHA-256: 3fab0fc3b90ae657650b98cd5fdd2ac407d0ec87187ce67e123591f7470f386a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of a link farm, suggesting the primary purpose is to drive traffic to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://advacarehealth.com/uploads/1/3/0/3/130312986/vejavafuxo.pdf
    • http://xijokinene.lifeneo.com/uploads/2020/01/27/50b77ed25f40a.pdf
    • http://mimiandjoel.us/uploads/1/3/0/6/130604287/befitokitozuwisafewi.pdf
    • http://rachelscala.com/uploads/1/3/0/4/130476539/rejotimorij.pdf
    • http://supermassive.agency/uploads/2020/01/27/guzap.pdf
    • http://pp-offer.club/uploads/2020/01/28/salowoxewixutoj_morekazefubod.pdf
    • http://lisuntimor.com/uploads/1/3/0/6/130604288/widuzudelozan_mutobete_ketonas.pdf
    • http://orockrotorua.co.nz/uploads/1/3/0/3/130379317/nomemewabaxute-mepeguzavenugo-bogep.pdf
    • http://zotekaxowo.iyfootball.com/uploads/2020/01/27/veletu.pdf
    • http://cuppagusto.com/uploads/1/3/0/4/130493389/jakupilijuna.pdf
    • http://soloforsenate.com/uploads/1/3/0/3/130323268/f8cbb52d1aaa3.pdf
    • http://dipajo.takprosto.club/uploads/2020/01/28/f1e650d67.pdf
    • http://learnonlinefast.com/uploads/1/3/0/2/130288915/e029b.pdf
    • http://miguxak.freelance-zone.xyz/uploads/2020/01/28/tenuxada-pozidipi.pdf
    • http://daleru.lanticadimansotti.com/uploads/2020/01/27/3e2503a4b57ac19.pdf
    • http://louisagdesign.com/uploads/1/3/0/3/130313577/0aaa956.pdf
    • http://arlotrainor.com/uploads/1/3/0/6/130604610/3824046.pdf
    • http://artexart.uk/uploads/1/3/0/5/130550961/wupetav.pdf
    • http://nathanbrooker.com.au/uploads/1/3/0/4/130483690/ad23865f7bfb.pdf
    • http://raid.icu/uploads/2020/01/27/c1f07f42e950.pdf
    • http://woodlandstuition.com/uploads/1/3/0/4/130479123/130479123.html#chittenden+county+probate+court+forms

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001597.bin
68619781880b29d93f0bc412f08ad1b08042834ee72909419b9f9484ce9e1997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1597 7992 bytes

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