Malicious PDF — malware analysis report

Static analysis result for SHA-256 553db1f1c6b551bf…

MALICIOUS

PDF

41.7 KB Created: 2020-03-20 14:02:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b7cf5c9228e617de00e18762f844b823 SHA-1: 03f55e7d20620ef7405dc62b259ef9bdd1e8784d SHA-256: 553db1f1c6b551bfc13c6ee7cea680c5d385dc73a43da17b6d66e7b3ee6d18ae
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL, http://shorewardsurge.com/uploads/1/3/0/3/130323889/130323889.html#algo+esta+cayendo+aqui+guitarra, is one of many pointing to domains that appear to be part of a link farm. This suggests a tactic to manipulate search engine results or to distribute further malicious content. No scripts were extracted from this sample.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://shorewardsurge.com/uploads/1/3/0/3/130323889/130323889.html#algo+esta+cayendo+aqui+guitarra
    • http://carvedcreations.co.nz/uploads/1/3/0/2/130287852/557744.pdf
    • http://banriapharma.com/uploads/1/3/0/7/130775318/dasofabuxe-libulanisotuz-posutavevunekaj.pdf
    • http://www.stopgappropertymanagement.com/uploads/1/3/0/5/130551656/1759c87afc7a83.pdf
    • http://fitthrufaith.net/uploads/1/3/0/5/130551349/piriduder_suvupaxe.pdf
    • http://polmaksondaj.com/uploads/1/3/0/7/130739544/pawuju-neweroni.pdf
    • http://mail.ramageddon.com/uploads/1/3/0/5/130589270/zefiwexowiv.pdf
    • http://thepowellcompaniesllc.com/uploads/1/3/0/6/130603702/9509499.pdf
    • http://qualityledlighting.online/uploads/1/3/0/5/130551222/sulosofanune-xonololaja-zekizuvivozi.pdf
    • http://nationalphilanthropynetwork.com/uploads/1/3/0/5/130550956/jepuwixaz-nafoxo-suvupexuvafi-bejizo.pdf
    • http://www.electric-garden.com/uploads/1/3/0/5/130550748/6614817.pdf
    • http://store.frecklefaceboutique.com/uploads/1/3/0/4/130435872/d98c04d2d.pdf
    • http://www.fatrocktile.net/uploads/1/3/0/4/130483067/labufovunidug-bijesopiwususam.pdf
    • http://thomasturkle.com/uploads/1/3/0/9/130969813/teruxore.pdf
    • http://dessertwithpurpose.com/uploads/1/3/0/6/130603702/3272523.pdf
    • http://beautybyellav.com/uploads/1/3/0/3/130324011/ganakoxaziran.pdf
    • http://ministeriofuegoyautoridad.com/uploads/1/3/0/4/130436159/saroxuzuvovalo.pdf
    • http://robertsoninsurancegroup.net/uploads/1/3/0/7/130739553/segemideloguve.pdf
    • http://tuknikgs.com/uploads/1/3/0/4/130435843/f23654c46.pdf
    • http://corgicias.co.uk/uploads/1/3/0/9/130969355/pevapi-xulilukefarakon.pdf
    • http://www.mylanguagetutor.com.au/uploads/1/3/0/5/130546354/fusibag_piralapumute.pdf
    • http://www.prakruti-anukruti.com/uploads/1/3/0/5/130542852/519e4488394a.pdf
    • http://www.churchilltailors.com/uploads/1/3/0/9/130969750/xotinudiguba.pdf
    • http://educationforprosperity.org/uploads/1/3/0/5/130590724/desakix.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df5.bin
bf458abe44c306065abdc59c91bb18cc1aa8e19f26b2a6108dbbb06eecddaa06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF5 9248 bytes
font_01_sfnt_off00008fa1.bin
83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA1 2604 bytes

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