Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7042a5b1159a5f…

MALICIOUS

PDF

53.5 KB Created: 2020-03-12 07:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2b5520bae3870ba4225fff76c8c88a1d SHA-1: 20284c058f223c9523f87dede67bbaf6f636be98 SHA-256: ed7042a5b1159a5f6b6325e7f7f9a8160aa85942a72c704a9a5ecfc17843691f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier also strongly indicated maliciousness. The document body text is largely obfuscated but contains a URL that is also present in the list of external links. This suggests the primary purpose is to act as a lure or distribution point for other malicious content.

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://zpo9t.bpmtc.com/uploads/1/3/0/5/130543600/130543600.html#ayatul+kursi+youtube+lyrics
    • http://classabae.com/uploads/1/3/0/5/130588403/4922922.pdf
    • http://mx.williamcunningham.net/uploads/1/3/0/7/130775623/feruxipazat.pdf
    • http://16365redington.com/uploads/1/3/0/7/130775972/zuluje_pujogaze.pdf
    • http://experiencinglifebusiness.com/uploads/1/3/0/9/130968984/ca55d9a1b.pdf
    • http://www.astainofink.com/uploads/1/3/0/6/130639021/jetarunuxajubij-numitonudom.pdf
    • http://scootersafari.co.nz/uploads/1/3/0/5/130590312/bovekumi.pdf
    • http://hostmaster.tomling.net/uploads/1/3/0/2/130289397/nupikivupuwi.pdf
    • http://tunstall-health.com/uploads/1/3/0/6/130639203/zorigodumube.pdf
    • http://chaoyue.video/uploads/1/3/0/4/130490181/medafafote_loxodiwudiwu_kugesuladusuk_famizomogufewil.pdf
    • http://www.winmytrailer.com/uploads/1/3/0/5/130539336/vosiloraguwopaxu.pdf
    • http://trufflesliving.com/uploads/1/3/0/4/130476086/7925330.pdf
    • http://www.bluebuoydesign.co.uk/uploads/1/3/0/6/130604749/fawiva.pdf
    • http://paulmelton.net/uploads/1/3/0/5/130590291/vinefajotarobow-datafuvesa-ratisowuzosaj.pdf
    • http://angelialayton.com/uploads/1/3/0/8/130874073/neseza_raderomulezojuf.pdf
    • http://laserginecologico.net/uploads/1/3/0/7/130775666/razeseg_zadup_fozutara.pdf
    • http://eliteforextraders.net/uploads/1/3/0/5/130539329/616746deacc.pdf
    • http://bridesburgoc.com/uploads/1/3/0/5/130538996/xisajeferutulap.pdf
    • http://forteacademyofmusic.com/uploads/1/3/0/7/130739928/569cda.pdf
    • http://hawaiiweddingrental.com/uploads/1/3/0/6/130620889/pikawo_vopapizowiligaz_puxex_girade.pdf
    • http://deckarte-rs.com.br/uploads/1/3/0/5/130542780/kipivupivoxagiba.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009b0a.bin
e77e72dc86a2e35c1d60e4453ef2888cffa0954fa6263a6054220960edd8acf9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9B0A 24448 bytes
font_00_sfnt_off00007c5b.bin
9336bcc0407d82acaef5d6d0391d4208892936f37817750940805b3781dae681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 7912 bytes

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