Malicious PDF — malware analysis report

Static analysis result for SHA-256 680c6f95bb6c98b7…

MALICIOUS

PDF

38.0 KB Created: 2020-04-01 15:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 569c5cb940fbdaf30001ef794db9c685 SHA-1: 630c819ef2b7b88d72994a0cac942e28fa6ffcf0 SHA-256: 680c6f95bb6c98b73fb88909fd9c3bcaeb9c77b06f01156ddca296118163d46c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded URLs point to various domains, suggesting a link farm or SEO spam campaign. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the sheer volume of external links indicates a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://chupacabrasmovie.com/uploads/1/3/1/1/131164152/131164152.html#programacion+lineal+pdf+libro
    • http://aa7designworkshop.com/uploads/1/3/0/4/130488700/lezolaz-getipaleb-xadadosasili-lavetikojumupu.pdf
    • http://orionhomeinspect.com/uploads/1/3/0/3/130323375/4c9149a6241a.pdf
    • http://nutricline.com/uploads/1/3/1/4/131407222/fisadupu_xemokizasofak_zewesat_disezur.pdf
    • http://nealybirthandlactation.com/uploads/1/3/0/3/130323635/8644457.pdf
    • http://skylarchangwatercolors.com/uploads/1/3/0/5/130588467/6085390.pdf
    • http://abetterdealhere.com/uploads/1/3/1/0/131071188/5578550.pdf
    • http://renewablesco.org/uploads/1/3/0/4/130489367/dalujazuda.pdf
    • http://100goc.com/uploads/1/3/0/5/130539981/lorox.pdf
    • http://pawsitivepetsittingoftruckee.com/uploads/1/3/0/6/130639241/58185.pdf
    • http://thelashlibraryandcompany.com/uploads/1/3/0/9/130969211/6132834.pdf
    • http://fountainalleysoaps.com/uploads/1/3/0/4/130436006/9022651.pdf
    • http://hjeminteriors.com/uploads/1/3/0/6/130639363/nutafudigedogu-zujunumovipe.pdf
    • http://taraandsam.com/uploads/1/3/1/4/131437865/lejaserase-gajane.pdf
    • http://bakedbythelake.com/uploads/1/3/0/6/130620627/1473764.pdf
    • http://mnnewfs.com/uploads/1/3/1/4/131407051/133f3.pdf
    • http://highlightshopping.com/uploads/1/3/0/5/130588201/tujemijugebole-zevadexipi-sazuvabuvisoxe.pdf
    • http://aracal.com/uploads/1/3/0/4/130475883/9054987.pdf
    • http://storeretaildd.com/uploads/1/3/0/6/130621906/3637742.pdf
    • http://3324user72cba-ckd.com/uploads/1/3/1/3/131381904/budaxoku-zukel.pdf
    • http://bellaandpolly.com/uploads/1/3/0/7/130775047/8c3158.pdf
    • http://deleescheque.nl/uploads/1/3/0/6/130639240/vagufidojodobul.pdf
    • http://mx.amandathomasart.com/uploads/1/3/1/1/131163536/miturazej.pdf
    • http://vincenzomariaromano.com/uploads/1/3/0/4/130435844/wilamame.pdf
    • http://blackbooks.biz/uploads/1/3/1/1/131164496/747fdae90a6.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e3.bin
702ce5fcacba0ab3920d1f026da6f83032fa02503bc2daaca175839053c55a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E3 8444 bytes

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