Malicious PDF — malware analysis report

Static analysis result for SHA-256 d739787089fbe94a…

MALICIOUS

PDF

37.1 KB Created: 2020-03-29 05:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2be85e033aa43b8dc34da220386c651c SHA-1: 2c7557b2e6fa73d12d48e9cdec5b42f1b600c531 SHA-256: d739787089fbe94aba5062e552715bf8e5fad566641eb18a1f695e0251f21be7
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body contains garbled text along with a few URLs, suggesting it is designed to obscure its malicious intent and potentially serve as a landing page or redirector. The primary attack pattern involves directing users to these external 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://adsl-63-204-18-8.benefitplans.org/uploads/1/3/1/3/131380641/131380641.html#horario+de+atencion+gestion+escolar+upiicsa
    • http://preview.teakslockservice.com/uploads/1/3/0/5/130588960/fuzurapisadu_butap.pdf
    • http://kfxmiami.com/uploads/1/3/0/8/130874088/3f6bf.pdf
    • http://cforcinema.org/uploads/1/3/0/4/130489446/fe4b6.pdf
    • http://www.alexisnicolebeauty.com/uploads/1/3/0/2/130289638/nuwetinewep_xowufefaz_xepuvazifebakal_gebakedeselarok.pdf
    • http://www.ihsknightbaseball.com/uploads/1/3/0/7/130739763/827425.pdf
    • http://nextbillionventures.com/uploads/1/3/0/3/130379549/zelinopesut.pdf
    • http://www.pikecountypaving.com/uploads/1/3/0/9/130969259/3515309.pdf
    • http://www.georgehoskenjoinery.co.uk/uploads/1/3/0/6/130639916/juzoremevina-pifeva-kopulosowurow.pdf
    • http://newzealandlgbtiaward.com/uploads/1/3/0/7/130775288/teluforidozupe_mebame_kamisevose_lobenewa.pdf
    • http://www.ud1977.com/uploads/1/3/0/8/130814871/sojapaviki.pdf
    • http://pinballwizard.org/uploads/1/3/0/2/130289640/1138208.pdf
    • http://tylersorrell.com/uploads/1/3/0/2/130289629/vanatozoxir.pdf
    • http://loeblibrary.net/uploads/1/3/0/5/130588803/sejumim.pdf
    • http://kotlinforums.com/uploads/1/3/0/6/130605176/mavuj_darixewupo_kipetu_mazosutobegusu.pdf
    • http://socialmynd.com/uploads/1/3/0/4/130491166/9752091.pdf
    • http://michiganroofmasters.com/uploads/1/3/0/6/130621098/c550f33c7b15.pdf
    • http://alchemiste.com/uploads/1/3/0/6/130604759/mopeti.pdf
    • http://mx.thesillysmock.com/uploads/1/3/0/7/130739093/sopen.pdf
    • http://refugerecoverybrisbane.com/uploads/1/3/0/8/130814575/luseduzoroguwod-juxibiti-tifubawid.pdf
    • http://wishbonespet.net/uploads/1/3/0/4/130483400/rikejonogo-taropidiliwoji-duketepumakav.pdf
    • http://ch-ck.co/uploads/1/3/0/7/130776126/noguwukesaxevu.pdf
    • http://nataliebritecoaching.com/uploads/1/3/0/7/130776249/9293405.pdf
    • http://obsessed-with-the-globe.com/uploads/1/3/0/9/130969514/dibebalejatonezexuf.pdf
    • http://www.mywavepower.com/uploads/1/3/0/6/130605420/bilajerurokin-dutebunukosit.pdf
    • http://carolinehamakeupartistry.com/uploads/1/3/0/5/130588833/eed7ebec384c9.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_off000064f9.bin
7f11e5f631ed4f4a946bf024d5ae87b421e09910ea6feb8439d6ffa961f20517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 8720 bytes

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