Malicious PDF — malware analysis report

Static analysis result for SHA-256 388f6f93421b34a8…

MALICIOUS

PDF

48.6 KB Created: 2020-04-17 08:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 36ba1b59e7a0b81301c0daa2373dedf5 SHA-1: 2042b7a4789ff0421a1c10fed6f2d2428ee6311a SHA-256: 388f6f93421b34a8db94a0680c869acce976d14478013ab555ef1450b4ee159f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to PDFs with numeric slugs, indicative of a link farm. The document body contains garbled text and a URL that appears to be the primary lure. The primary attack pattern involves redirecting users to a network of external sites, likely for SEO manipulation or to serve further malicious content.

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://freelancefreedom.org/uploads/1/3/1/3/131384284/131384284.html#speed+slow+on+iphone
    • http://themeetthegateproject.net/uploads/1/3/0/9/130969278/6684988.pdf
    • http://ourbeautifulfeet.org/uploads/1/3/1/6/131606844/289898.pdf
    • http://lkradio.online/uploads/1/3/0/5/130589002/dimub.pdf
    • http://meridianvalues.com/uploads/1/3/0/6/130639413/nivapitiposag_bizib_ximiv.pdf
    • http://thecoldthatcreepsin.com/uploads/1/3/0/9/130969946/4921fe1.pdf
    • http://jftsd.com/uploads/1/3/0/4/130435629/5279294.pdf
    • http://eminenece.com/uploads/1/3/0/8/130814643/wenipedojogukid.pdf
    • http://floppycat.net/uploads/1/3/1/1/131163872/jidaka.pdf
    • http://davidheydenrych.com/uploads/1/3/1/4/131437254/zilufegizewer-funukaxuto-vidunurame.pdf
    • http://vo2breathe.com/uploads/1/3/0/5/130542853/vudeleje.pdf
    • http://snowcity.us/uploads/1/3/1/6/131606347/9823878.pdf
    • http://gogotaubman.com/uploads/1/3/1/3/131379650/mugoxiwigupilet-muwagude-nelawizi-kiwamosezakemip.pdf
    • http://aymedspa.com/uploads/1/3/1/3/131378868/tegamebipijavarot.pdf
    • http://stephaniehazel.com/uploads/1/3/0/6/130621472/zasivalixa_fabotezoda_gipibividasem.pdf
    • http://minibab.com/uploads/1/3/0/6/130604375/rajanakuromow.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_off0000951c.bin
d39d6d8d499ae5cd125255775f893a4f96b674417872a1335250c83a7a12894c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x951C 8684 bytes

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