Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b78b5b899ef6d5d…

MALICIOUS

PDF

40.9 KB Created: 2020-03-30 23:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4747db6f35c990a57d56fd4a01794ebc SHA-1: 0b32391470be476810700d98bd11744c938294a9 SHA-256: 6b78b5b899ef6d5d171e172c916658bdce448058283bca69a4d2c215ca65c2ae
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The embedded URL `http://mynaturalplace.com/uploads/1/3/0/6/130621495/130621495.html#how+to+set+slide+to+unlock+on+iphone+5s` and the other 29 URLs point to various PDF files, indicating a coordinated effort to distribute content or manipulate search engine results. The ML classifier strongly flagged this PDF as malicious.

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://mynaturalplace.com/uploads/1/3/0/6/130621495/130621495.html#how+to+set+slide+to+unlock+on+iphone+5s
    • http://marinuskosterfoundation.org/uploads/1/3/0/2/130288567/7835411.pdf
    • http://x2notcovers.com/uploads/1/3/0/2/130272850/gijudebotewejamowav.pdf
    • http://thegrayorganization.org/uploads/1/3/1/1/131164043/96816a6ea.pdf
    • http://gen3painting.com/uploads/1/3/0/2/130289460/d83d47a.pdf
    • http://dutchiesfreshmarket.com/uploads/1/3/0/6/130621507/7920336.pdf
    • http://mysunfast3200.com/uploads/1/3/0/6/130621031/bodusuniron-tojimavexa-rikokik.pdf
    • http://friendsofsevierpark.net/uploads/1/3/0/3/130313657/2487018.pdf
    • http://wordofthecrossministries.com/uploads/1/3/1/0/131070051/zoretogegiri.pdf
    • http://rokowooncentrum.nl/uploads/1/3/0/4/130476101/povuponavifo.pdf
    • http://oilfeildclothing.com/uploads/1/3/0/6/130621412/c15b55.pdf
    • http://signaturelandscapeanddesign.com/uploads/1/3/1/3/131380539/welinoxozide.pdf
    • http://jenferdinandsen.com/uploads/1/3/0/9/130969375/dukagupubaz.pdf
    • http://conunacanoninmano.com/uploads/1/3/0/5/130538839/lojafurapig.pdf
    • http://wine-oh-tours.com/uploads/1/3/0/3/130323127/4975183.pdf
    • http://edgeproductions.ca/uploads/1/3/0/6/130639231/2303783.pdf
    • http://martinhandmadeboots.com/uploads/1/3/0/5/130589412/gelatol_pabig.pdf
    • http://pco-lite.com/uploads/1/3/0/7/130775543/tutekijiji.pdf
    • http://thebusybabyboutique.net/uploads/1/3/0/7/130738796/6038670.pdf
    • http://offishallifestyle.com/uploads/1/3/0/7/130740414/zegimovipo.pdf
    • http://bigtimeradio.co/uploads/1/3/0/6/130621666/3743584.pdf
    • http://shekouarcheryclub.com/uploads/1/3/1/0/131070761/6024230.pdf
    • http://moorereplacements.net/uploads/1/3/0/2/130291640/tofegetobisogovuke.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_off000075b2.bin
2812629bb51e10010c1c46b44b4819433f2834a3a428fb2414548a19f7de14cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 7884 bytes

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