Malicious PDF — malware analysis report

Static analysis result for SHA-256 392435baeae8f22f…

MALICIOUS

PDF

50.5 KB Created: 2020-03-20 08:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1e628ecf9413ba5761b492e31752169d SHA-1: e386bd82284104d3eb33fd5fdcbb2395f61d2d66 SHA-256: 392435baeae8f22ff8feba060b5d2c9d7fed7f4a5b45c7ec596c4dfc08b31285
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted across numerous domains. This pattern is indicative of SEO spam or a link farm designed to distribute malicious content or drive traffic. The ML classifier strongly supports the malicious verdict, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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
  • 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://vbjl-mitglieder.de/uploads/1/3/0/7/130739316/130739316.html#comida+tipica+de+rumana
    • http://www.yogameetsmusic.com/uploads/1/3/0/3/130379429/9a430604e2ba78c.pdf
    • http://ncexchangeclub.com/uploads/1/3/0/4/130488583/3738458.pdf
    • http://ballersstrength.com/uploads/1/3/0/6/130604193/dodowokofe_pifaloxuluw.pdf
    • http://scopehomeinspection.com/uploads/1/3/0/5/130589399/8627648.pdf
    • http://www.sfcamperrental.com/uploads/1/3/0/5/130545254/f90179d681.pdf
    • http://lincoln-realty.net/uploads/1/3/0/8/130814017/7332118.pdf
    • http://shoptopsttar.site/uploads/1/3/0/4/130489434/cda479f.pdf
    • http://www.thestoryoffifa.com/uploads/1/3/0/3/130323145/livolumi_nojuz_xurewa_xuvijunoxoju.pdf
    • http://nurturingnursery.com/uploads/1/3/0/9/130969504/220127f30a2d05.pdf
    • http://www.xandle.com/uploads/1/3/0/3/130379146/basuwekifoke_metuv.pdf
    • http://afterglow-care.com/uploads/1/3/0/5/130539728/0842277d3bf59.pdf
    • http://theexpertdoc.com/uploads/1/3/0/2/130291350/3738375.pdf
    • http://www.graphicshut.net/uploads/1/3/0/2/130289347/7732560.pdf
    • http://mibias.net/uploads/1/3/0/6/130620366/zudotat_vozonenodazoti_kozuxadul_beriripubolu.pdf
    • http://www.navigatebetween.me/uploads/1/3/0/5/130544694/6006411.pdf
    • http://lunamcruz.com/uploads/1/3/0/4/130476447/kilapaj.pdf
    • http://tune1.net/uploads/1/3/0/6/130604646/bizobafenosujovax.pdf
    • http://pmehard.com/uploads/1/3/0/6/130621443/zagerojor.pdf
    • http://organallocation.com/uploads/1/3/0/5/130589125/tutegizo_lijaretun.pdf
    • http://northstarbees.com/uploads/1/3/0/5/130545932/6ff8f7802654d79.pdf
    • http://www.killforeden.com/uploads/1/3/0/6/130620854/1482798.pdf
    • http://4thandunion.com/uploads/1/3/0/8/130874559/fa2a566.pdf
    • http://chichesterfootandankle.org/uploads/1/3/0/4/130477192/masadadajir.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abb0.bin
4687f1e63d4a04acdd0123bf54cff46b44ad764ac10b5b5e4f70e4142d4a1558		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB0 10848 bytes

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