Malicious PDF — malware analysis report

Static analysis result for SHA-256 baef3de3db7827cf…

MALICIOUS

PDF

62.2 KB Authoring application: Smallpdf Desktop
MD5: ea508bc8685a020bbbb9e1a9aea87759 SHA-1: 6e9c2a783551ba38f3676913e5b2ddbbb4934563 SHA-256: baef3de3db7827cf2f9dad221f912a2376ed18b9338da73edf2826564887f092
152 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary attack pattern observed is a link farm, with 31 external PDF links embedded within the document, predominantly pointing to domains like 'bodux.metlkom.ru'. This suggests a strategy to drive traffic to potentially malicious or phishing content, possibly for SEO poisoning or to distribute further malware. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://bodux.metlkom.ru/uploads/2020/01/29/lujud.pdf
    • http://pathogenassassin.com/uploads/1/3/0/5/130588251/d1c74bc9b5c547.pdf
    • http://pulatkonak.com/uploads/1/3/0/4/130476200/864ee2e45292fb.pdf
    • http://disodot.bazarym.com/uploads/2020/01/28/4731871.pdf
    • http://nickidenicki.com/uploads/1/3/0/4/130483275/jikutiziloladow.pdf
    • http://sosweetcare.com/uploads/1/3/0/6/130639683/nobojumul.pdf
    • http://zojeb.gorlobolit.ru/uploads/2020/01/28/3565520.pdf
    • http://copperleafeq.com/uploads/1/3/0/2/130272978/moniruzubixuwivoxuso.pdf
    • https://juwogoluzena.weebly.com/uploads/1/3/0/3/130379590/5540030.pdf
    • http://sanfrancisco-interactivehypnotherapy.com/uploads/1/3/0/4/130477245/palemowovime_taxifa_fekavem_ritubibelara.pdf
    • http://pandacute.fun/uploads/2020/01/28/tovem_fabufikutozetem.pdf
    • http://condor-x.ru/uploads/2020/01/27/31945d.pdf
    • https://fenodunow.weebly.com/uploads/1/3/0/4/130476574/8197151.pdf
    • http://monkeesconcerts.com/uploads/1/3/0/6/130621426/raxupafamedated.pdf
    • http://ourvillagefarmacy.com/uploads/1/3/0/6/130605299/4adf803.pdf
    • http://lightonwatertcm.com/uploads/1/3/0/4/130488445/8681320.pdf
    • http://blubloggs.com/uploads/1/3/0/4/130490609/d9eb405991.pdf
    • http://wrappedupinlove.com/uploads/1/3/0/5/130551994/130551994.html#couperin+tic+toc+choc+sokolov

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000132c.bin
761e6b7d0629b1fb2e240e4f9b1e0838066ba5e4e8143c123becf5f492594b9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132C 12228 bytes
font_01_sfnt_off0000a3aa.bin
2d75eb7bc5c7fc5a72204c4b8a05cc4a5448a1fd64d8ff31e0975cea1d7bc4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AA 9792 bytes

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