Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc58a3901639b85…

MALICIOUS

PDF

49.5 KB Authoring application: Pdftk
MD5: b17831569cc0a75cb57e90487edfe97d SHA-1: 3d6ff2a78490e4a37a052e1f00ffd78ba18d215c SHA-256: dcc58a3901639b85244cd7d9eaddd78364335775d59c4d99e7f868e17590a27a
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and an ML classifier returned a high probability of maliciousness. The PDF contains a large number of embedded external links, characteristic of a link farm designed to distribute phishing content or malware. The document body text, though partially corrupted, mentions 'Sia cabin crew interview questions and answers', suggesting a lure to attract victims.

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://dporfebre.com/uploads/1/3/0/6/130604945/3762768.pdf
    • http://bethevibration.com/uploads/1/3/0/6/130621226/3590188.pdf
    • http://monicajlivingston.com/uploads/1/3/0/4/130435574/pujotamevotogi.pdf
    • http://plantdrpeter.com/uploads/1/3/0/6/130640218/98b0fa4117ea006.pdf
    • http://lodkivam74.ru/uploads/2020/01/28/kowoxe_bixukeda.pdf
    • http://balonskydancer.net/uploads/1/3/0/5/130550742/sagapejajuraf.pdf
    • http://nuenlist-holzkunst.ch/uploads/1/3/0/6/130621691/48572c3c1ee.pdf
    • http://a1412531xstreamtravel.xsideas.com/uploads/1/3/0/2/130287462/130287462.html#sia+cabin+crew+interview+questions+and+answers

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ad.bin
9d6b9b39961f36a5a223578d44eb6ef67a9899271ff3c70c4c871cac8705589d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD 9140 bytes
font_01_sfnt_off00007a72.bin
dcd79678780f9df101063a0971d284418ebab3d6a6f5b539deea1ecddc86f952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A72 16440 bytes

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