Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce7c040f6192337…

MALICIOUS

PDF

38.3 KB Authoring application: QPDF
MD5: b1be4297635b5e90efcc96bfd5b65765 SHA-1: 460b745200dd378a813acaf7a459286743891bd1 SHA-256: 5ce7c040f619233760d06f47d71cfc7c60ca7d3432ee89effaa4945e1ecce63d
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 spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body is heavily obfuscated and does not provide clear instructions, but the heuristic firings are sufficient to assess the attack pattern.

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://bluecornconsultingllc.com/uploads/1/3/0/6/130640194/siwejuxudox_witowupiw.pdf
    • http://thepacketpusher.net/uploads/1/3/0/6/130639573/jiwuborawekomuneg.pdf
    • http://cassowaryday.org/uploads/1/3/0/2/130272290/1995892.pdf
    • http://preyprey.com/uploads/1/3/0/9/130969186/9660074.pdf
    • http://rainfordvillage.co.uk/uploads/1/3/0/8/130814226/8aadb6dc8193a1.pdf
    • http://southwaltonblues.com/uploads/1/3/0/8/130813330/9968732.pdf
    • http://creativehealthcaremanagement.net/uploads/1/3/0/7/130775632/317e14a39b857.pdf
    • http://www.autumnrumpf.com/uploads/1/3/0/7/130775231/nujedez.pdf
    • http://theriversedgeranch.com/uploads/1/3/0/2/130287454/f10a71d4058.pdf
    • http://topnotchfitness.org/uploads/1/3/0/6/130639809/1394360.pdf
    • http://www.mailademann.com/uploads/1/3/0/6/130620667/9fdc5cf9.pdf
    • http://amybournephotography.com/uploads/1/3/0/7/130775441/batipokuzixanab.pdf
    • http://danebrewerllc.com/uploads/1/3/0/7/130775395/vuxudonavoros.pdf
    • http://boldespresso.com/uploads/1/3/0/2/130270796/pikenijapomedekam.pdf
    • http://pulleyautoparts.com/uploads/1/3/0/7/130776454/kopukilowageri.pdf
    • http://www.fheyouthcheer.net/uploads/1/3/0/5/130539428/xigomem.pdf
    • http://deadeyestudios.co/uploads/1/3/0/6/130639764/bozukakuburerilakego.pdf
    • http://lightningreleases.net/uploads/1/3/0/7/130775598/90d74c73ffd8.pdf
    • http://barbaramcleanoneil.com/uploads/1/3/0/8/130813115/zuvejizo.pdf
    • http://message6666.com/uploads/1/3/0/7/130740164/4b41eea77803.pdf
    • http://deliverresultsnow.com/uploads/1/3/0/2/130289587/luxadexagujugof.pdf
    • http://www.secure-pof.com/uploads/1/3/0/5/130588931/130588931.html#editor+pdf+para+pc+windows+10

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003454.bin
0b4777206e6d46e5ce16cb2d1693e9e3a797820ea42936bdbc58cf9cbac6c4fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3454 8268 bytes

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