Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c44c02a134e385…

MALICIOUS

PDF

39.1 KB Authoring application: pdf-parser
MD5: b96a032a1848931281e1a462f617f68c SHA-1: 12d0fc332a78afacdac53d0219060a62204b9036 SHA-256: 52c44c02a134e385a8448998585a6d8f76ebd36ced4996094b0dda3c697582c0
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The PDF_SEO_LINK_FARM heuristic specifically identified a large number of external links, with the first being http://muttleys.ca/uploads/1/3/0/2/130287548/nipelagox.pdf. This suggests the document's primary purpose is to act as a link farm, likely for phishing or malware distribution, rather than providing legitimate content.

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://muttleys.ca/uploads/1/3/0/2/130288707/57dc01470f442e.pdf
    • http://molim.net/uploads/1/3/0/5/130550940/zavitoposejuwij.pdf
    • http://theshiatsuroom.co.uk/uploads/1/3/0/5/130588847/kedala.pdf
    • http://authorjulievail.com/uploads/1/3/0/6/130605397/jazuwil-jeresamub-tobedulonop-gepudub.pdf
    • http://kew.grahamconstructoin.com/uploads/2020/01/29/xijefi_momuwa.pdf
    • http://bumivebir.eccex.fun/uploads/2020/01/28/wemopapojojojijir.pdf
    • http://modestohandyman.com/uploads/1/3/0/2/130287548/nipelagox.pdf
    • http://olsonphotographystudio.com/uploads/1/3/0/5/130588463/3599510.pdf
    • http://tixidu.respektmebel.ru/uploads/2020/01/27/firupalag_sawikevetizidos_vawajut_badijujiza.pdf
    • http://mohannadgharaibeh.com/uploads/1/3/0/5/130588307/0456ab.pdf
    • http://oakclass.com/uploads/1/3/0/6/130640081/130640081.html#free+printable+addition+of+fractions+worksheets

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001483.bin
16c0eeeaa5d1b20cae525870b36e25206c478f0efe9cca461b5110273a44e15a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1483 7972 bytes
font_01_sfnt_off00005d74.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 2652 bytes

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