Malicious PDF — malware analysis report

Static analysis result for SHA-256 e599e20191547cdc…

MALICIOUS

PDF

39.5 KB Created: 2020-03-16 12:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e9dfd6a0a1521fbb5ac3b4828bf93be1 SHA-1: 48e1307f668415ae74e5eefbf30049bd73ffc765 SHA-256: e599e20191547cdcf09d48f433d16f1d71780e2c510de28a5214c36cf0c30445
96 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The primary URL identified is http://rsghzb.salon225.com/uploads/1/3/0/6/130621713/130621713.html#chocolate+sheet+cake+with+cherry+pie+filling, which is part of a link farm. The document body contains garbled text and what appears to be metadata from the wkhtmltopdf tool, suggesting it was programmatically generated.

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://rsghzb.salon225.com/uploads/1/3/0/6/130621713/130621713.html#chocolate+sheet+cake+with+cherry+pie+filling
    • http://www.obap.cassidyturleysites.com/uploads/1/3/0/2/130288453/151f6391e1d603.pdf
    • http://mx.gabrielsherry.com/uploads/1/3/0/2/130287291/mebibegixoful.pdf
    • http://jaeladi.com/uploads/1/3/0/3/130323527/d2e5b0e091.pdf
    • http://www.fluidaestheticsart.com/uploads/1/3/0/3/130313632/topavetag_gitabobekovus.pdf
    • http://flannicats.com/uploads/1/3/0/8/130874520/553103.pdf
    • http://hostmaster.shoutoutfilms.com.au/uploads/1/3/0/9/130969593/c47d49af468.pdf
    • http://newresume2019.com/uploads/1/3/0/4/130476738/8648448.pdf
    • http://cpanel.contoursandclay.com/uploads/1/3/0/7/130775840/5677eb52f0a1112.pdf
    • http://www.laurenpulcipher.com/uploads/1/3/0/5/130546486/wevufiludagiliza.pdf
    • http://micahtwilson.com/uploads/1/3/0/6/130640181/7933445.pdf
    • http://hamilhandiwork.com/uploads/1/3/0/3/130324289/punutekez.pdf
    • http://www.charityhutchens.com/uploads/1/3/0/2/130291485/bidoruxobodinen.pdf
    • http://www.royaltybyblood.com/uploads/1/3/0/5/130551554/a0f0d5db6e7ff81.pdf
    • http://dlrapartments.com/uploads/1/3/0/8/130814216/zusegukupenizinep.pdf
    • http://rainbowofvisions.com/uploads/1/3/0/6/130620888/0903cb3d2294f2.pdf
    • http://blissful-thinking.net/uploads/1/3/0/6/130620668/gulezijusonimotazam.pdf
    • http://webmail.casadedios.us/uploads/1/3/0/5/130541351/jorumenudefat-zaletiledibel-voviz-desekojo.pdf
    • http://terracottagardens.net/uploads/1/3/0/3/130313466/5363368.pdf
    • http://www.nordicinternational.net/uploads/1/3/0/6/130620989/xujiguzegevido-banenonotud-mugefe-banelolopogan.pdf
    • http://shabazztribe.com/uploads/1/3/0/4/130483703/9550661.pdf
    • http://leanworkingcapital.com/uploads/1/3/0/6/130621361/7690635.pdf
    • http://www.murfhoff.com/uploads/1/3/0/7/130739889/linalivefuto_zupovivuve.pdf
    • http://laphet.net/uploads/1/3/0/5/130551746/melulimenuzixutu.pdf
    • http://hmcrew.com/uploads/1/3/0/2/130270957/vejaxakulare-wixumubete-gijifowowudesom-dibate.pdf
    • http://laphet.net/u
    • 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_off00007245.bin
929053633ba250ccdc623a74f773b339c043f9cd82a435a2df222537d67f56e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7245 7552 bytes

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