Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd038851c70cd353…

MALICIOUS

PDF

83.8 KB Created: 2021-03-24 22:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6294408262eea8ba0d1f30e5b911080 SHA-1: d10985dcb3ffb0faa740e8364f5c4652935233c6 SHA-256: fd038851c70cd3530b06031b914b00209353a4499f9f93041a6cc39a0633e0ee
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a search query for game codes, suggesting a SEO spam or phishing lure. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of many external URIs and the high confidence scores from detection engines indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=super+mario+sunshine+action+replay+codes+gamecube
    • https://cdn.sqhk.co/nisisepolo/hLIhbxM/93608390971.pdf
    • https://cdn.sqhk.co/pixazizaze/cjgcY8u/on_my_own_les_miserables_song_download.pdf
    • http://jenuxijaf.mygamesonline.org/48799956934.pdf
    • http://gepanukotex.getenjoyment.net/formato_anamnesis_para_nios.pdf
    • https://cdn.sqhk.co/wijelukifap/g0ghzYh/vivigoxeposomenirenerija.pdf
    • https://cdn.sqhk.co/bikugipozamu/fMjGgdh/nova_launcher_setups_2020_download.pdf
    • https://cdn.sqhk.co/fubafonu/Q7NiaS4/truck_it_up_mod_apk_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefepugolupalax/regression_line_worksheet_mma_answers.pdf
    • https://8994dc82-3839-475c-8de5-8afaa5c13229.filesusr.com/ugd/798b5e_db9b35822b6b496fa164da163794891b.pdf?index=true
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_0f752707332f4843bce38f464247d983.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5fad97bc-d695-4045-8b0b-867337b6d595/menulob.pdf
    • https://uploads.strikinglycdn.com/files/906070f2-d97b-4533-a5e2-8f8c11a7aae9/34513289362.pdf
    • https://s3.amazonaws.com/mubemutolewe/broken_heart_quotes_pics.pdf
    • https://uploads.strikinglycdn.com/files/2a429d2d-c532-4f85-9da3-32e515e629ae/jo_goodwin_parker_what_is_poverty_analysis.pdf
    • https://s3.amazonaws.com/mejifavo/aashiq_awara_full_movie_480p.pdf
    • https://s3.amazonaws.com/gonima/samsung_scx_4623f_software_scanner.pdf
    • https://uploads.strikinglycdn.com/files/058f4b20-6d8f-47e9-a232-4ef1f264b4e7/why_the_book_of_thomas_is_not_in_the_bible.pdf
    • https://s3.amazonaws.com/foneniz/happy_birthday_to_you_song_telugu.pdf
    • http://giworutiw.myartsonline.com/somewhere_over_the_rainbow_chords_in_c_major.pdf
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_c790bb4b4de94ba2a77880cd389a8a0a.pdf?index=true
    • https://s3.amazonaws.com/tufitijinexu/aha_cardiopulmonary_resuscitation_guidelines.pdf
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_e4b0f5790c7c4c2f8ad1de2a9ed991dc.pdf?index=true
    • http://xojudemavu.onlinewebshop.net/68709305946.pdf
    • https://s3.amazonaws.com/bulozor/mafobijikotofegox.pdf
    • https://s3.amazonaws.com/julaxel/centennial_college_information.pdf
    • https://77a5c3e7-429a-4f60-ad30-886abaef4f6e.filesusr.com/ugd/07a1ab_5277e80bf6724a09b0d2c512bfb709fc.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010606.bin
43fba2189b4a95ba163c990ee99f84ef803d4d72baf3580410fa251a940b38b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10606 5832 bytes
font_01_sfnt_off000119b3.bin
77a8d30f0567b33b5b569504b428fbab0e3e3d9fff6474b1039637c0e5d8189f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 11164 bytes

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