Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5b44810e124c90…

MALICIOUS

PDF

44.2 KB Authoring application: pstoedit
MD5: 1faf999de192dd6d2b3e1ea2c3168fe7 SHA-1: 418a448ac1071640bb5d24c3fd57bb852b9f450c SHA-256: 4f5b44810e124c90fbc9e78c5fe174b774467057efca2e4ecbb7a6c30edb53ee
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, for malicious content. The critical PDF_SEO_LINK_FARM heuristic indicates a large number of embedded external links, with the primary domain being 897788976207812023.com. The document body also contains numerous URLs, reinforcing the finding of a link farm designed to redirect users to potentially malicious 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://897788976207812023.com/uploads/1/3/0/5/130544541/62a90702cc5.pdf
    • http://akashachamberlain.com/uploads/1/3/0/6/130621533/0dac42.pdf
    • http://capecodcoastalhomeinsurance.com/uploads/1/3/0/2/130291433/4aa19dd06b66125.pdf
    • http://labeautephotographie.com/uploads/1/3/0/5/130540664/demarisewafilom.pdf
    • http://lovelaughterandreallife.com/uploads/1/3/0/3/130379824/tolubesojatat_mapod_xojomunagunom.pdf
    • http://newzineland.weebly.com/uploads/1/3/0/4/130435780/ddf3278c03f37af.pdf
    • http://portcityseafoodsc.com/uploads/1/3/0/5/130589411/wujofovod.pdf
    • http://gumipeno.pharmaexpo.tech/uploads/2020/01/28/fibexowajularojul.pdf
    • http://nowator.eu/uploads/1/3/0/6/130604566/gonoxazok-tevunazuxiten.pdf
    • http://nashvillemobilepetgrooming.com/uploads/1/3/0/6/130639228/kawanadalujasufetok.pdf
    • http://midnighttokerstore.com/uploads/1/3/0/5/130541623/9776055.pdf
    • http://mondesubtil.com/uploads/1/3/0/4/130478205/79d5725.pdf
    • http://dimitrisdalakoglou.weebly.com/uploads/1/3/0/6/130639181/jizamukulowajuk.pdf
    • http://strozzistawzeeh.com/uploads/1/3/0/2/130272886/xivuz_jofepubuluwan_sujokazokazezaf_rezajuki.pdf
    • http://wallbrosdrywallservices.com/uploads/1/3/0/2/130289494/papaxikikug_ragazerewazekog.pdf
    • http://msdanielteaches.com/uploads/1/3/0/2/130288684/wutazugirokudaj.pdf
    • http://whimsicalpigs.com/uploads/1/3/0/5/130543333/7a4e4ddec373.pdf
    • http://kinevib.finresult.com/uploads/2020/01/27/xinurimujikozuvufo.pdf
    • http://threecreekaussies.com/uploads/1/3/0/5/130588905/3224225.pdf
    • https://bunekolu.weebly.com/uploads/1/3/0/5/130539101/viwoketumosam_vezim_febafexuwerij_zuvopoxavug.pdf
    • http://kardaautomotive.com/uploads/1/3/0/6/130621790/kutivowivutuf-xebujenupejed-wofipoxebaxul-bamuz.pdf
    • https://mudanezuk.weebly.com/uploads/1/3/0/2/130270917/1132980.pdf
    • http://xavuvi.smpix.ru/uploads/2020/01/28/0b43836ce9.pdf
    • http://planetarydrive.org/uploads/1/3/0/6/130605355/130605355.html#german+relative+pronouns+worksheet

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001837.bin
c4a4964b47071f77360ce078d6fccd333cd6f7d24bbc5a5351d0eddee971fed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1837 9448 bytes
font_01_sfnt_off000064c9.bin
669a22844ddb84b64a1d93eb6147c2b8b7ca76f4316fe4be2bbf69c96252e72a
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 16180 bytes