Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c9feb06b692acf…

MALICIOUS

PDF

34.8 KB Authoring application: QPDF
MD5: a626d3af33677e291444938302cc2265 SHA-1: 5471f94e4ea9de6225b0a312418028f958256070 SHA-256: 78c9feb06b692acf4a49bb175941f8eb3964dfb29aebb26762b62111b75fafd3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to host malicious content. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The embedded URLs likely serve as a lure to redirect users to potentially harmful content.

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://davidzimring.com/uploads/1/3/0/5/130590474/lomafedone.pdf
    • http://tek-n.com/uploads/1/3/0/5/130551356/4111672.pdf
    • http://revolutionofsenses.org/uploads/1/3/0/5/130588588/jiwukifoz-degatavaxetiful.pdf
    • http://n1-nw1-student-housing-studios-camden-kings-cross-london.co.uk/uploads/1/3/0/5/130589168/wozixejaza.pdf
    • http://terastationsucks.com/uploads/1/3/0/8/130873861/tiposiz.pdf
    • http://ninamarcela.com/uploads/1/3/0/4/130476538/beriruziso_zejesugut.pdf
    • http://mybellacouture.com/uploads/1/3/0/4/130435500/kufetogufumo-bopuvepu-bojuz-jukej.pdf
    • http://typeemup.com/uploads/1/3/0/5/130588712/relofule.pdf
    • http://mymaxtax.com/uploads/1/3/0/4/130488543/rorusipo-suwetivamil-zepovekoto-puzusal.pdf
    • http://learninglifestyleproject.net/uploads/1/3/0/8/130814601/3654728.pdf
    • http://stylesnsmilessalon.org/uploads/1/3/0/2/130272260/niwovi.pdf
    • http://pureexistencedance.com/uploads/1/3/0/6/130620898/xujogonirixebobile.pdf
    • http://ants.org/uploads/1/3/0/3/130323932/7235491.pdf
    • http://dunawaysurveying.com/uploads/1/3/0/7/130775242/manubo-bifav-roditogorir-dimisevavisufe.pdf
    • http://sherrivettescookies.com/uploads/1/3/0/6/130639298/kijexebotifor.pdf
    • http://swcfamilyretreats.com/uploads/1/3/0/6/130605161/pokamufu.pdf
    • http://cheapceramicknives.com/uploads/1/3/0/5/130588716/lutobumipuwim.pdf
    • http://www.fearlesssocial.net/uploads/1/3/0/5/130590195/130590195.html#aadhaar+card+documents+for+newborn

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cbb.bin
cea444d1d05d3e82b517dace0c52fd3288bd5207e8c2e625fcc12ecd29b66ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBB 7232 bytes

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