Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff412311423d04d…

MALICIOUS

PDF

37.3 KB Authoring application: GIMP
MD5: f7090a40615a8b6225034b896520852e SHA-1: 3d917640c16ea5ae08562e35a1ac88e2ab0c1c0f SHA-256: eff412311423d04d9d571c9f6569a2e844efa0e15d90b8bc55fa80a344c95d66
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' and 'CLAMAV_DETECTION' heuristics. The ML classifier also strongly indicated maliciousness. The document body itself appears to be corrupted or contains unrelated text, but the primary malicious activity is the extensive linking.

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://rebeccamcroberts.com/uploads/1/3/0/4/130488749/1781680.pdf
    • http://highfieldsfarm.com/uploads/1/3/0/6/130603773/972486.pdf
    • http://shouldtalk.com/uploads/1/3/0/3/130323520/578a9994.pdf
    • http://aveh.com/uploads/1/3/0/6/130604576/4952014.pdf
    • http://thehowtogeeks.com/uploads/1/3/0/6/130605069/3875718.pdf
    • http://the-joy-of-syntax.com/uploads/1/3/0/7/130739201/6e80d8.pdf
    • http://learnonlinefast.com/uploads/1/3/0/3/130313057/jurujitugikepebodek.pdf
    • http://ihateqatar.net/uploads/1/3/0/7/130775732/cd5f9f3e1c.pdf
    • http://thecounselxpress.com/uploads/1/3/0/4/130477468/31007f96a05eea8.pdf
    • http://lucasgarron.net/uploads/1/3/0/8/130813997/xoviza.pdf
    • http://niyati-plongee.com/uploads/1/3/0/6/130604090/4665171.pdf
    • http://nashvilleperformancepsych.net/uploads/1/3/0/2/130273578/safireru-vazejirokeko.pdf
    • http://bonniesthlm.com/uploads/1/3/0/5/130589095/legajokaji.pdf
    • http://bettyfoleyartquilts.com/uploads/1/3/0/6/130605168/bf485e776e484.pdf
    • http://gfplab.us/uploads/1/3/0/2/130271148/xebokenikorugodol.pdf
    • http://icantfocus.net/uploads/1/3/0/8/130874382/2127945.pdf
    • http://cpmiddleburg.com/uploads/1/3/0/3/130379803/88b65a.pdf
    • http://hostmaster.needleandfredonline.com/uploads/1/3/0/6/130604658/7046231.pdf
    • http://www.southof23.com.au/uploads/1/3/0/8/130874563/revak.pdf
    • http://ninaschjeide.net/uploads/1/3/0/3/130323290/liponizuj.pdf
    • http://archivistar.com/uploads/1/3/0/6/130621082/e56a96695ed.pdf
    • http://hodline.news/uploads/1/3/0/7/130776786/1302653.pdf
    • http://samogona.net/uploads/1/3/0/4/130436222/6376236.pdf
    • http://stanfordinnanaheim.devsite-1.com/uploads/1/3/0/8/130813478/130813478.html#buffalo+soldier+chords+and+lyrics

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001966.bin
b6c0a25f134c53bcf582c58a82719920b806231392af6a66417b36fabee6a348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1966 8172 bytes

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