Malicious PDF — malware analysis report

Static analysis result for SHA-256 8143f220c829d904…

MALICIOUS

PDF

37.4 KB Authoring application: pstoedit
MD5: 4be4cb558c148653247db76d0ec17ed2 SHA-1: c9dc41cf564c290dfc941cba7b5a859e7b8615e1 SHA-256: 8143f220c829d90439fb8ba6bbf6c25910678f933c4e98933969ae91505fd082
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links pointing to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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://jennyarenainteriors.com/uploads/1/3/0/7/130739029/1a7bd.pdf
    • http://mindbodymovementarts.com/uploads/1/3/0/6/130603822/315793.pdf
    • http://acceligen.org/uploads/1/3/0/6/130620863/5222629.pdf
    • http://steeltec.us/uploads/1/3/0/5/130548192/pegalivo_mubin.pdf
    • http://emmalingle.com/uploads/1/3/0/4/130476346/8081045.pdf
    • http://youthradiovermont.org/uploads/1/3/0/5/130541445/635b95.pdf
    • http://www.proseandpattern.com/uploads/1/3/0/2/130289618/4067428.pdf
    • http://gigapro888.com/uploads/1/3/0/3/130323488/vituwakerof.pdf
    • http://bcollectiveboutique.com/uploads/1/3/0/7/130775778/468927.pdf
    • http://marketingthemoments.com/uploads/1/3/0/6/130621918/42d49c895a1.pdf
    • http://namecoinforum.net/uploads/1/3/0/8/130814931/fd13bbbc.pdf
    • http://meridianintranet.com/uploads/1/3/0/3/130323290/muturufe.pdf
    • http://hillcrestvikings.com/uploads/1/3/0/4/130483550/c3bc1708d8b3d3.pdf
    • http://onlocation-sh.com/uploads/1/3/0/7/130739944/zogobijuwikib.pdf
    • http://mermaidfitnessbump.com/uploads/1/3/0/7/130739120/komopa_fotabowifazut_famokirudinapev.pdf
    • http://connect.barandudacommunitychurch.org/uploads/1/3/0/3/130323743/tovizuxereruf-zegodo-dusodabam-fetof.pdf
    • http://koasports.com.au/uploads/1/3/0/7/130739460/8b995e54c04a.pdf
    • http://motors-auto.com/uploads/1/3/0/6/130639336/80f38.pdf
    • http://purrfectpurr.com/uploads/1/3/0/4/130436258/tinozizokusabi-tiwakulogekuv.pdf
    • http://genesis-schoolsofhope.com/uploads/1/3/0/6/130621622/5772444.pdf
    • http://grassrootsdrift.com/uploads/1/3/0/2/130272644/gazofokojizuto.pdf
    • http://a1720852xstreamtravel.xsideas.com/uploads/1/3/0/6/130640021/130640021.html#area+and+perimeter+of+a+parallelogram+worksheet+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000318b.bin
80a94fdb4ce507c4b5a74e9f6efdf6a24a18c577aa43803c3d246f251b87997d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 7940 bytes

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