Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc39bcec3ad5bba…

MALICIOUS

PDF

97.5 KB Created: 2020-03-13 03:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 23dc7485f78cb60ebc7ca4a8afd59993 SHA-1: 777ae0e59c589c6f83fcbed98b01ac79b6f065c8 SHA-256: ccc39bcec3ad5bbaa35bec18ed51e867fa89f538f5ea4cc39a1dc16ccec8abfc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by an ML classifier as malicious. It contains a large number of external links, many of which appear to be part of an SEO link farm, suggesting a potential redirection or phishing scheme. The primary URL identified is http://host238.carmichaelnl.com/uploads/1/3/0/7/130740073/130740073.html#anaerobic+digestion+process+description. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://host238.carmichaelnl.com/uploads/1/3/0/7/130740073/130740073.html#anaerobic+digestion+process+description
    • http://www.apo-efg-conference.org/uploads/1/3/0/4/130478110/cdcc1ee54a182.pdf
    • http://thelocalpresssandwichbar.com/uploads/1/3/0/7/130775027/5040481.pdf
    • http://translatio.co.uk/uploads/1/3/0/7/130776755/zejusopukeduwe.pdf
    • http://www.belladonnacookies.com/uploads/1/3/0/4/130488067/kutomufuluv.pdf
    • http://brutalproxies.com/uploads/1/3/0/8/130874593/feriperorog.pdf
    • http://mikemooers.com/uploads/1/3/0/2/130272340/gurevagovamun_tabila_dezudekul_tagazimixuneg.pdf
    • http://mocamarketing.com/uploads/1/3/0/5/130545627/mepev.pdf
    • http://moldinspectalbany.com/uploads/1/3/0/7/130739582/mapavisuwejub.pdf
    • http://ns.colourwizards.com/uploads/1/3/0/4/130476385/ludamibaditemobimu.pdf
    • http://webmail.greatstartsaginaw.org/uploads/1/3/0/2/130289756/14dea7.pdf
    • http://ckhunters.com/uploads/1/3/1/0/131070695/2b786cbce4e3.pdf
    • http://lilliandlotti.com/uploads/1/3/0/8/130814873/newexaze.pdf
    • http://seanodanielscarity.com/uploads/1/3/0/3/130379347/datesuxaxula_meganimunib_bilulo_lowisikawizikun.pdf
    • http://buddy-burner.com/uploads/1/3/0/6/130605216/ab1318cac70af.pdf
    • http://girshdesign.com/uploads/1/3/0/3/130379246/892d8c5.pdf
    • http://nestpsychiatry.com/uploads/1/3/0/5/130551349/5517148.pdf
    • http://www.poppylocksmacros.com/uploads/1/3/0/5/130588858/riboki_jopojilonas.pdf
    • http://mynorthstarcares.com/uploads/1/3/0/5/130588573/momumiramoporo-zasenetizapozat-vozuxinudut.pdf
    • http://ljhentertainment.com/uploads/1/3/0/6/130603922/zufidaxokesowi-kupalotekofit.pdf
    • http://cjs-interventores.com/uploads/1/3/0/2/130287211/denuvimi.pdf
    • http://sirwilbertfitness.com/uploads/1/3/0/7/130775484/botor.pdf
    • http://shawpolygraph.com/uploads/1/3/0/7/130776866/9e381a91b9d7dd.pdf
    • http://threelittlebirdsshop.com/uploads/1/3/0/5/130588579/xibuzazirijikod_bolaxa_lupeliwudizo.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
font_00_sfnt_off000149d7.bin
0053c232fe59ba8a4ff2bd345f20e047d233a049cc2d6c83a19ab16cb77faed9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149D7 9908 bytes
font_01_sfnt_off00016d77.bin
93a6b667d9a0503f29ead18684ace14e4afecb4865bc97b8e43ab863f7c7f1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D77 2680 bytes

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