Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe286d2d0b3326a…

MALICIOUS

PDF

84.8 KB Created: 2021-03-14 14:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4cecdedf9dbbe5e7084da944e9e4380 SHA-1: ee1967574241d6057f01ef9669978f12a513437e SHA-256: 2fe286d2d0b3326ad01a195b3c99a1dcbaba1ee53719ac39787d1518d084580e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a lure related to watching a TV show. The presence of a PDF link farm heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://pelibifir.ru/wix?keyword=watch+entourage+season+1+episode+3+online+free
    • http://dipunag.getenjoyment.net/impact_of_internet_on_globalization.pdf
    • https://xuxomesepek.weebly.com/uploads/1/3/4/6/134681539/526c6f14e52d43a.pdf
    • http://lnstagramcentre.net/lekepafcbga.pdf
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/tefexukuge_xunus_waduxux.pdf
    • http://instapriz.online/samsung_ubd-k8500_best_pricefdmxq.pdf
    • http://tesocoin.online/18025504546s4ndc.pdf
    • http://zokupez.mygamesonline.org/cecil_medicine_26th_edition.pdf
    • http://begdas.space/rovedufomuxukepabaxusexyu907.pdf
    • http://lezigovedavide.getenjoyment.net/2014_maserati_granturismo_sport_convertible_for_sale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_1e732cf967b640f0abcd0502a740c931.pdf?index=true
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_2c816eb09e2a4a1db58146788be39332.pdf?index=true
    • http://wevikokuzufos.epizy.com/napakotopupulatot.pdf
    • http://daxizupalapa.rf.gd/english_corpus_linguistics_an_introduction.pdf
    • http://vugugemo.atwebpages.com/90774987320.pdf
    • https://s3.amazonaws.com/luborinizu/how_much_do_private_investigators_earn_australia.pdf
    • https://s3.amazonaws.com/kovozenamofox/89349906383.pdf
    • https://16fd32d6-95e0-4b29-89ad-7162b4f2ffbe.filesusr.com/ugd/9f4b57_034fe1f755d04fe0adbb3cabea5ec0a4.pdf?index=true
    • http://lemaponu.rf.gd/ibm_aix_unix_commands.pdf
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_d790a49840464956923444059d463f21.pdf?index=true
    • http://joluvolob.epizy.com/how_to_fix_a_dometic_fridge.pdf
    • https://s3.amazonaws.com/posufij/nomigajem.pdf
    • https://s3.amazonaws.com/patotale/36745032300.pdf
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_24a1a1e77f164730a90ab00c92f7a64c.pdf?index=true
    • https://s3.amazonaws.com/xukirizugukugi/rupabopufatuvaboj.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bd7.bin
37b06ab05d730a9358b523c00acd2159f032af11f58061aec5297df251dddabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD7 5648 bytes
font_01_sfnt_off00011f1d.bin
18bc4d67fbc5e92eb2e82ad7ad6dd3e94c837f73aa820e445f88f1be06bacf3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1D 11228 bytes

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