Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd1e7dff9f10c6a…

MALICIOUS

PDF

39.4 KB Created: 2020-03-30 01:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 60737a7e565dc10bf4a66767a2522438 SHA-1: 160ff5799a499ca722d93e945cb2256d19148fbc SHA-256: 5fd1e7dff9f10c6a34f70800266ae7b13b490dca3f518a41b8a52d9b2fe020c9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The embedded document body text, though garbled, contains a URL that is also present in the list of external links. This suggests the primary purpose is to redirect users to a network of linked PDF files, potentially for SEO spam or to host malicious payloads.

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://socalasta.voyagerwebsites.com/uploads/1/3/1/4/131406544/131406544.html#gif+de+personas+hablando+por+telefono
    • http://xcelon.net/uploads/1/3/0/6/130604312/mimumifenu.pdf
    • http://cruiseenthused.com/uploads/1/3/0/7/130774962/8531241.pdf
    • http://yessicacurielmontoya.com/uploads/1/3/0/7/130775214/9250009.pdf
    • http://almagroupsrl.com/uploads/1/3/0/7/130738993/xudaloligodo.pdf
    • http://nicolasandysmillinery.com/uploads/1/3/1/3/131384024/tiwufevupewatimipone.pdf
    • http://huntercopp.com/uploads/1/3/0/7/130740012/4209094.pdf
    • http://travelcafe.blog/uploads/1/3/0/9/130969904/6035571.pdf
    • http://thatshop.rocks/uploads/1/3/0/6/130639251/3bc6447757d.pdf
    • http://christalouks-uxdesign.com/uploads/1/3/0/4/130436140/4da880936afb4.pdf
    • http://technogist.in/uploads/1/3/0/8/130874088/b0557b.pdf
    • http://microrhymelove.com/uploads/1/3/0/7/130739544/lipudedi-gozudeposaxafar-gepunip-sutexudel.pdf
    • http://villagecafehampstead.com/uploads/1/3/0/6/130603842/jimelejevolulivazute.pdf
    • http://analysisoftheatre.org/uploads/1/3/0/2/130272880/pusamigitanekef.pdf
    • http://christinariddick.pink/uploads/1/3/0/6/130622114/7587394.pdf
    • http://hometravel.org/uploads/1/3/0/3/130379227/vuwinobaxesezewa.pdf
    • http://lsbarbecue.com/uploads/1/3/1/1/131164387/26d89.pdf
    • http://swansongstudiosart.com/uploads/1/3/0/2/130272377/getowogufutabugumopa.pdf
    • http://dazmedia.net/uploads/1/3/0/6/130640057/2974629.pdf
    • http://pezularealty.com/uploads/1/3/0/7/130775859/2f3fa060a0f00.pdf
    • http://originalmailboxcompany.com/uploads/1/3/0/7/130776168/pidixenejir.pdf
    • http://blocktradeco.com/uploads/1/3/0/6/130605034/19ae2522fe.pdf
    • http://bling-rifficaddiction.com/uploads/1/3/0/9/130969656/2559012.pdf
    • http://strongherfasther.org/uploads/1/3/0/5/130552073/lezukalizodef.pdf
    • http://asktheculturequeens.com/uploads/1/3/0/8/130814672/2004695.pdf
    • http://onehikeatatime.com/uploads/1/3/0/6/130620574/gegosawilapexopumu.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_off00007172.bin
c1fd4dc4ee5a8d2f8dd789d8c753f22cfb4dfd2500b841445375f28a59af614a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 7644 bytes

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