Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7cb29785fe7307…

MALICIOUS

PDF

103.1 KB Created: 2021-03-14 04:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c503284e1faf5bbbc4d22adc71e0d79c SHA-1: 9972f98c7bc21f1daeb787959a41c9ebd9194fa0 SHA-256: 7d7cb29785fe7307cb9b2197f941e0702501c11c4334a5815116462a613854ee
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search query, likely intended to trick the user into visiting a malicious site. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • 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://mezovuduw.ru/award?keyword=organic+chemistry+alkanes+alkenes+alkynes+pdf
    • http://mazafaka69pussy.online/94823090242cza3e.pdf
    • http://walkover.me/flow_cytometryz3ltw.pdf
    • http://nesobaka9.xyz/371734346544ks2.pdf
    • https://cdn.sqhk.co/siduniberame/7ihw3Hv/54783285787.pdf
    • http://linza.media/immanuel_kant_theoryuag7f.pdf
    • https://cdn.sqhk.co/rolileduvof/ghajjij/can_you_learn_to_dance_at_home.pdf
    • https://cdn.sqhk.co/vumatoxikom/jeggicb/zojukodijogodajuboreda.pdf
    • https://cdn.sqhk.co/jotenitix/8hhhfSY/90669074589.pdf
    • http://zuzorovix.scienceontheweb.net/el_conde_de_montecristo_pelicula_online_latino_hd.pdf
    • http://sy0n.icu/37956483420aa40j.pdf
    • http://rukozhop-guide.com/lorunukilebudamenesipow8mnvn.pdf
    • http://pestore.pro/tipomidogusokotagufudbeq2.pdf
    • http://yandex-dostav.ru/wordly_wise_3000_book_7_test_bookletch88q.pdf
    • https://cdn.sqhk.co/xafileme/TxWMMfh/11603469478.pdf
    • http://baliferifopiz.mypressonline.com/how_many_milk_ducts.pdf
    • http://good-production20.site/ideas_para_reciclar_botellas_de_plasticowbl5k.pdf
    • https://cdn.sqhk.co/zutomina/khbg837/amazon_small_gold_hoops.pdf
    • http://mapugukabazewu.scienceontheweb.net/myra_estrin_levine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jarepumemaxi.onlinewebshop.net/tivulomusovavifono.pdf
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_27fc940bbc5e49388dc6711abbb2a69d.pdf?index=true
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_2ac5cbd708c24785ad4404a1b1a91b03.pdf?index=true
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_efcc49a999d2435db169d47d88271c5d.pdf?index=true
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_2abddd24a00d44f2976cfdb83819cc64.pdf?index=true
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_250dc5fa242a43869ab23436e32339c9.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c39.bin
e86d14db75c7d73de4a6c9eb62f86ab02d7d6346bb3ea1060b575e5058025d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C39 5760 bytes
font_01_sfnt_off00014fad.bin
b85807c6b1920a0872a0ab69a21698c6536890e4a38f309806b51f752ab44ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAD 11568 bytes
font_02_sfnt_off00017762.bin
a1bdc24ec6dc0332449754d26803ee00bb6717469f64a18f47c680e22104396b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17762 16080 bytes

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