Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c563632e2cbcdf…

MALICIOUS

PDF

49.7 KB Created: 2020-03-19 07:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 34e44ec3415fceca35c31e394f7c8a85 SHA-1: c587e747c12164702c64119e4da47c42aac7d214 SHA-256: 87c563632e2cbcdf59e1c21169e2d3d8daddf52a55cb826f7debe65b68468ba2
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body contains garbled text and metadata, but the primary malicious activity appears to be the extensive link farm.

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://ciggysound.com/uploads/1/3/0/6/130604563/130604563.html#abreviatura+de+carretera+nacional
    • http://hanaleivodka.com/uploads/1/3/0/8/130874554/dolibogasodibatu.pdf
    • http://blancameira.com/uploads/1/3/0/6/130621124/6275587.pdf
    • http://sarahlawsondesign.com/uploads/1/3/0/6/130604558/sejijolafi.pdf
    • http://autodiscover.equident.com.au/uploads/1/3/0/4/130477048/supukajekodo.pdf
    • http://lemaitresmoker.nl/uploads/1/3/0/6/130621043/5028655.pdf
    • http://www.cellrite.co/uploads/1/3/0/4/130488416/jerupotibol.pdf
    • http://bugsthathelp.com/uploads/1/3/0/5/130588922/77beaee6c18a.pdf
    • http://ardmorevetservices.com/uploads/1/3/0/6/130640021/vifesabi-kuseno.pdf
    • http://hotwinedeals.com/uploads/1/3/0/5/130589182/7428665.pdf
    • http://pof-updatecall.com/uploads/1/3/0/7/130776887/6091879.pdf
    • http://arsdoceopress.com/uploads/1/3/0/8/130874264/a32e6f23d3206d6.pdf
    • http://donotpanicitsorganic.com/uploads/1/3/0/9/130969418/pefazasodoserawizigu.pdf
    • http://www.science4kids101.com/uploads/1/3/0/5/130550654/5978298.pdf
    • http://lorimerclarkeart.com/uploads/1/3/0/9/130969738/39fb519f7bfad5f.pdf
    • http://summerfoxart.com/uploads/1/3/0/6/130620797/meweriwopu.pdf
    • http://snackopedia.com/uploads/1/3/0/2/130287878/5636469.pdf
    • http://louisvillepsychiatry.com/uploads/1/3/0/6/130604693/gozonefewo.pdf
    • http://lisareimann.com/uploads/1/3/0/6/130603782/2061548.pdf
    • http://divinesoulcenter.com/uploads/1/3/0/5/130546391/duweze-feruduxasubonim.pdf
    • http://www.watchmepass.com/uploads/1/3/1/0/131069762/aef5c6.pdf
    • http://cryosapsllc.com/uploads/1/3/0/6/130621209/sugolew.pdf
    • http://columbusbalance.com/uploads/1/3/0/8/130874497/7282220.pdf
    • http://abqroofs.com/uploads/1/3/0/3/130323092/264dcf.pdf
    • http://cmcparadigms.com/uploads/1/3/0/6/130604716/zewaxujaka-vapipenepewi-jixaliwejut.pdf
    • http://northshoreplaytherapy.com/uploads/1/3/0/2/130271229/nosebazuxiwevijebow.pdf
    • http://northshoreplaytherapy.com/uploads/1/3/0/2/13027
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a92.bin
96c8d1e0080c4f2b47e10aecb8909acc8add6442e9870363aef2cf2ce70d766c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A92 9632 bytes
font_01_sfnt_off0000ad78.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD78 2652 bytes

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