Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecea248c1a38f5f0…

MALICIOUS

PDF

42.3 KB Created: 2020-04-02 01:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f44494da89fd6b8d612549a6327362e5 SHA-1: 857ac3294f0dfef85c02c548bfd4336950713316 SHA-256: ecea248c1a38f5f07a08802822bec171199585ca97038c40333f3e4883766d5a
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that the embedded links are intended to lead users to harmful resources.

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://ggmmonterd.com/uploads/1/3/1/0/131070302/131070302.html#serial+number+xilisoft+video+converter+ultimate+7.8+19
    • http://personaltrainersurabaya.com/uploads/1/3/0/4/130436033/e25b74f1af403f.pdf
    • http://craephotography.com/uploads/1/3/0/7/130739835/puvizobar_kowojo_xokodewagul_fadakevedi.pdf
    • http://espace-de-renouveau-de-soi.com/uploads/1/3/0/4/130436289/sazafazixujux_susuvidawip_pekodadu.pdf
    • http://mattprahl.com/uploads/1/3/0/4/130488417/tesob.pdf
    • http://uncommonbeards.com/uploads/1/3/0/6/130620690/56c4ece2717.pdf
    • http://timeerasesallroughsituations.com/uploads/1/3/0/4/130483200/bekunuwarusi.pdf
    • http://escorti-milano.com/uploads/1/3/1/4/131407035/cc334efd5fd9e6f.pdf
    • http://o2mengineering.com/uploads/1/3/0/9/130968935/3702058.pdf
    • http://slotruth.org/uploads/1/3/0/6/130639445/nevusata.pdf
    • http://dreamdistribution.org/uploads/1/3/0/2/130270874/5b70e7d1c2807.pdf
    • http://boominworld.com/uploads/1/3/0/6/130620793/2fa59ea51f51b.pdf
    • http://universvoyages.org/uploads/1/3/0/7/130775848/7606498.pdf
    • http://aerialstuntscootersfullforce.com/uploads/1/3/0/5/130544541/korisumasuzaf-pafeweb-tekak.pdf
    • http://esmeraldaramirez.com/uploads/1/3/0/7/130776088/nibuto.pdf
    • http://farmbilt.com/uploads/1/3/0/2/130271187/tulofurafi-xewizilexu-batusurerejudo-visukarosaz.pdf
    • http://kako.fi/uploads/1/3/0/6/130605387/b0be111ff1462.pdf
    • http://oasisforfreethinkers.com/uploads/1/3/0/6/130639317/lofavewerepalaniku.pdf
    • http://gowickedkettlecorn.com/uploads/1/3/0/5/130588256/b81ee3dba.pdf
    • http://andonbutton.com/uploads/1/3/1/4/131452972/malekununusofarani.pdf
    • http://naturalbeautypdx.com/uploads/1/3/0/6/130604785/gidufubetodoxul.pdf
    • http://wingcollection.com/uploads/1/3/0/3/130323552/bulodakasex-dopugigezadolar-lokoxeri.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_off00007af0.bin
8d35f001a22081b3f79c2c98a327f1294e3c1b58c64cb949ce3e5c63d341bda2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF0 8312 bytes