Malicious PDF — malware analysis report

Static analysis result for SHA-256 1060ef7b12f6991c…

MALICIOUS

PDF

41.0 KB Created: 2020-03-29 05:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e82f5215d4ddb994ed7727d3764a7f73 SHA-1: 148cba42031a191e110edaed205b131d5220f396 SHA-256: 1060ef7b12f6991c658ec8ac6a0d7721ac01b1259e0aee310c8eb9a76c4487fc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were extracted, the sheer volume of external links suggests an attempt to drive traffic to potentially compromised or malicious web pages.

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://74-123-72-13.mgwnet.com/uploads/1/3/1/1/131163664/131163664.html#pasos+para+hacer+un+proyecto+de+investigacion+cientifica
    • http://affectivedevelopment.com/uploads/1/3/0/5/130588291/minalutijivi-rovejozoso-lurodawilid.pdf
    • http://empoderadasparaelreino.com/uploads/1/3/0/2/130288392/009ddbd1a6.pdf
    • http://thefitboxhouston.com/uploads/1/3/0/2/130272070/nadaretosew_dusuvoz_vedora_visanetanu.pdf
    • http://buyfrombruce.com/uploads/1/3/1/0/131070255/baf3225c55f.pdf
    • http://picnicdinnerhelp.online/uploads/1/3/0/6/130639549/revon.pdf
    • http://mountainvilleumc.com/uploads/1/3/0/6/130604524/49c3f43.pdf
    • http://noxanima.com/uploads/1/3/0/6/130620585/pabow.pdf
    • http://msgrieco.com/uploads/1/3/0/6/130620482/sejepoxedekewev.pdf
    • http://ccsb.danafarberdev.org/uploads/1/3/0/6/130605124/2855628.pdf
    • http://godseverydaydishes.com/uploads/1/3/0/4/130435956/bd23b1d3591.pdf
    • http://sustainablegreenaquaculture.com/uploads/1/3/0/7/130775182/fovadigajaso_vuzupa_fivitu.pdf
    • http://www.acapella-communicatie.com/uploads/1/3/0/7/130738673/zarejufesumegorare.pdf
    • http://splinteredminds.com/uploads/1/3/0/5/130543761/5cf19.pdf
    • http://smgeatwellfeelgreatlookgreat.org/uploads/1/3/0/4/130483400/tobaduta.pdf
    • http://www.kalanclinic.com/uploads/1/3/0/5/130541574/5006ee884d740b.pdf
    • http://jeffcentrelloactor.com/uploads/1/3/0/5/130588199/lisoduvoke-xedivuma-moxejav.pdf
    • http://rootfivefarm.com/uploads/1/3/0/3/130313263/sijofijitagaxaxu.pdf
    • http://fantasybyamor.com/uploads/1/3/0/6/130620931/wekebodatag_radul.pdf
    • http://www.mygrassfedmeat.com/uploads/1/3/0/5/130588492/tekuzovikelevofokage.pdf
    • http://hammermancommunications.com/uploads/1/3/0/7/130775295/kegivozarefavedal.pdf
    • http://whatyouwantcreations.com/uploads/1/3/0/6/130605217/vogufit.pdf
    • http://limitlessriders.com/uploads/1/3/0/7/130776385/fedowisirobekun-rafejawop-tisunokapomew-dibemixitepale.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_off000075f9.bin
430294040e14771502fece439505454bac8baf59705801094eaf4a8b036bb577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 8108 bytes

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