Malicious PDF — malware analysis report

Static analysis result for SHA-256 143d5f5744a29c38…

MALICIOUS

PDF

31.8 KB Authoring application: pstoedit
MD5: a20d2f69a8d241ede737d094f00cf433 SHA-1: 76257c9934674db16f582d13f1aa1845e5245ee7 SHA-256: 143d5f5744a29c38713a9597a42148430384c41cd8b5a584bba23857f16a3886
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve as a link farm to redirect users to malicious sites, as indicated by the ClamAV detection and ML classifier. The document body itself is heavily obfuscated and contains some of these URLs, suggesting a phishing or malware distribution attempt.

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://spacewithapurpose.com/uploads/1/3/0/6/130621829/gijovolijov_milaz_bozujipodebili_bawirekor.pdf
    • http://remsofflorida.com/uploads/1/3/0/2/130291786/0793068604.pdf
    • http://szpital2019.pl/uploads/1/3/0/6/130604918/2435109.pdf
    • http://calcool.us/uploads/1/3/0/5/130589442/4176888244.pdf
    • http://iamallsmiles.com/uploads/1/3/0/7/130775837/0669b57925c.pdf
    • http://walkermoore.org/uploads/1/3/0/8/130815140/belekekisibu-zugaz-rojizojagovumub-rukavititu.pdf
    • http://trumpgang.org/uploads/1/3/0/5/130543536/902496.pdf
    • http://triosimplantdentallab.com/uploads/1/3/0/7/130739060/5001605.pdf
    • http://the-well.net/uploads/1/3/0/5/130550704/melejosinunu-jabuvivisuxuf-wujalipeto-datuw.pdf
    • http://ethosforlife.net/uploads/1/3/0/6/130604589/685b602698957f7.pdf
    • http://telenomella.com/uploads/1/3/0/9/130969801/ruxiv_basoronaka_gomafikajekiki.pdf
    • http://www.paintrockinn.com/uploads/1/3/0/6/130604011/6093298.pdf
    • http://eminencetravel.net/uploads/1/3/0/4/130435956/3193306.pdf
    • http://watermelontees.com/uploads/1/3/0/2/130291555/jaguwujuvupap-jinudevefolo-vojegevi.pdf
    • http://mylifeisamesspodcast.com/uploads/1/3/0/6/130604793/c62f5a93.pdf
    • http://merchmerchmerch.shop/uploads/1/3/0/6/130620642/5941327.pdf
    • http://bcups.org/uploads/1/3/0/6/130639851/medegadedi.pdf
    • http://joeblitzstein.net/uploads/1/3/0/4/130435987/4996a7.pdf
    • http://mylocalcfo.gammaxiques.org/uploads/1/3/0/4/130476172/130476172.html#acknowledgement+for+project+class+12+physics

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000204c.bin
b99781613309d892c616621c9851eecabb0c867fca1f20194046388182a0aaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x204C 7096 bytes

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