Malicious PDF — malware analysis report

Static analysis result for SHA-256 b261ed8bb2dd87fa…

MALICIOUS

PDF

49.9 KB Created: 2020-03-12 11:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b82b0c53cda34c696b6e79024abec787 SHA-1: eb3275947e2f15491e7b65724ba321b70103f552 SHA-256: b261ed8bb2dd87fac1f7a0a57b974273771c45718d01b53744dfe03a2984a695
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attack. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but also includes URLs that are part of the link farm. No scripts were extracted, and the primary malicious activity appears to be directing users to a large number of external PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ndtasanantonio.org/uploads/1/3/0/8/130813967/130813967.html#ignition+timing+adjustment+terminal
    • http://www.kendrickfitness.com/uploads/1/3/0/6/130620668/nolimilipoz.pdf
    • http://pof-liveaddcalls.com/uploads/1/3/0/4/130476385/xabel-delofinuwixoju.pdf
    • http://www.nypdvolleyball.com/uploads/1/3/0/5/130547275/tagererotekulaguzusa.pdf
    • http://nityakumar.com/uploads/1/3/0/3/130313306/vujesoxo.pdf
    • http://www.grandmacards.com/uploads/1/3/0/6/130639628/7752631.pdf
    • http://luxmentis.com.au/uploads/1/3/0/6/130640231/furato.pdf
    • http://oxe1.com/uploads/1/3/0/4/130476359/faca644bb12b.pdf
    • http://www.themomma.org/uploads/1/3/0/6/130639355/xanomenagaxudedorivo.pdf
    • http://luxeaam.com/uploads/1/3/0/6/130639052/b56fab0b9f47fd7.pdf
    • http://lifebalancekit.co.uk/uploads/1/3/0/5/130550952/mifoxisilanopunejowo.pdf
    • http://www.kairos-fitness.com/uploads/1/3/0/3/130324005/xapifilefoli.pdf
    • http://dailymedreminder.com/uploads/1/3/0/6/130621666/6930789.pdf
    • http://redcarpetfestival.live/uploads/1/3/0/6/130620544/699149.pdf
    • http://www.voilafineartrental.com/uploads/1/3/0/4/130483540/9208621.pdf
    • http://yesforfallschurch.com/uploads/1/3/1/0/131070493/79d167b369b.pdf
    • http://thyfaulttough.com/uploads/1/3/0/6/130604530/952794.pdf
    • http://www.powerlaunching.com/uploads/1/3/0/4/130483390/3927062.pdf
    • http://shopbrvybunzulhair.com/uploads/1/3/0/6/130604882/8364308.pdf
    • http://basemetalwork.com/uploads/1/3/0/5/130588880/6574834.pdf
    • http://wellnesspractitioner.co.uk/uploads/1/3/0/8/130873869/medurira_latiwajozo.pdf
    • http://www.paiement-fedex.com/uploads/1/3/0/4/130476976/zoberolofatobigu.pdf
    • http://amy-rose-music.com/uploads/1/3/0/6/130621812/6424945.pdf
    • http://www.fhsandbox.com/uploads/1/3/0/5/130551661/rusesonag-lakuzuvevijota.pdf
    • http://bossyulechengwangshangbaijiale.f18.ebkf.org/uploads/1/3/0/2/130289235/dulag_bosefezuzur_sarerori.pdf
    • http://rbelectricalservices.net/uploads/1/3/0/4/130435820/52ba972f6d89807.pdf
    • http://rbelectricalservices.net/uploads/1/3/0/4/130435820/52ba972f6d8
    • 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_off000095db.bin
60c016dbb977e336275902ca956e52e98c146594de41e653914ee01305bc3f75
pdf-font-stream PDF embedded font (sfnt) at offset 0x95DB 9456 bytes