Malicious PDF — malware analysis report

Static analysis result for SHA-256 728aa4c25a3d4970…

MALICIOUS

PDF

33.3 KB Authoring application: GIMP
MD5: acaf869c2a1d2a85b7fe7e6c37d01e0e SHA-1: 6589c74469a8c8a1e3895ca5d37fe2c86b2485ee SHA-256: 728aa4c25a3d4970bee1a28134f195050f53f75b495dbe9a7493be432f6e95cf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique commonly used for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the sheer volume of outbound links suggests a malicious distribution or redirection scheme.

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://clamagorereef.com/uploads/1/3/0/6/130622012/8ae051.pdf
    • http://ramblinghouseshow.com/uploads/1/3/0/3/130313307/5722908.pdf
    • http://puredogbreedregistry.com/uploads/1/3/0/5/130550846/xuzafo_wanedunuvenaj_xefaxenale.pdf
    • http://midlifekrysis.com/uploads/1/3/0/6/130604477/7482054.pdf
    • http://sacvalleypettingzoo.com/uploads/1/3/0/5/130551856/sinugog_vujixekedizi.pdf
    • http://panuro.sakninhna.com/uploads/2020/01/27/9430177.pdf
    • http://bellathevagablond.com/uploads/1/3/0/6/130639436/tofeluroworijivezuv.pdf
    • http://solitlife.net/uploads/1/3/0/6/130639393/62412ca9.pdf
    • http://rockhillpestpros.com/uploads/1/3/0/4/130435902/4fe1ec805738.pdf
    • http://silaneguardbuy.info/uploads/2020/01/28/gitaxotejewi.pdf
    • http://sonjalanehart.com/uploads/1/3/0/5/130538992/zodonuvaluguwaw.pdf
    • http://sdbau.shop/uploads/1/3/0/3/130379351/gutewuko_zilipetaluten.pdf
    • http://nataliaestradaeditor.com/uploads/1/3/0/3/130323836/visum.pdf
    • http://sciencesmartssociety.org/uploads/1/3/0/6/130605433/zubazadenarijip.pdf
    • http://jededo.dutrocheff.com/uploads/2020/01/28/lazuk.pdf
    • http://nwbookpro.com/uploads/1/3/0/2/130289564/10379135.pdf
    • http://re-aligningwithnature.weebly.com/uploads/1/3/0/2/130270783/03016.pdf
    • http://stopgossipping.com/uploads/1/3/0/6/130620563/jopufojudameladofik.pdf
    • http://deeguitar.com/uploads/1/3/0/6/130640181/nevafunabuxi.pdf
    • http://snsmedia.org/uploads/1/3/0/5/130588616/nupugakasaveg-muten-xozavowik.pdf
    • http://cecilyeiferle.com/uploads/1/3/0/4/130476229/130476229.html#aggregator+transformation+in+informatica+group+by

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000157b.bin
3516b8840ac4c7730a63c21674645bcfdca4b2620eb178c64337745a3491d996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157B 7368 bytes

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