Malicious PDF — malware analysis report

Static analysis result for SHA-256 b507afb88c15e941…

MALICIOUS

PDF

78.2 KB Created: 2021-02-20 04:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d850501893eee557357eb2effb7191bc SHA-1: d7f5280eb7affbce53b281261b4f26859892a37b SHA-256: b507afb88c15e9412db1fc5070e574a9b9ba4fd22c2610366e08d6b5039e8d51
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, disguised as a search result, likely leads to a malicious site designed to exploit the user. No scripts were extracted, but the presence of embedded URLs and the nature of the PDF suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=bladesinger+guide+5e
    • http://3bki.ru/86260471730beocy.pdf
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/4311489.pdf
    • http://insta-sale.site/56248262818w6kh8.pdf
    • http://jirafka.space/use_submit_button_outside_formzb9ai.pdf
    • http://pycnidwzxc.info/13929208768yaaf4.pdf
    • http://mbfsopg.com/tik_tok_sad_flute_ringtone_download_2020wrpty.pdf
    • http://1s.london/90651473166misj0.pdf
    • http://love-cosmetics.shop/que_es_la_investigacion_cientifica_pura_y_aplicada9ih8t.pdf
    • https://wiwetone.weebly.com/uploads/1/3/4/6/134660192/dokitetonorira.pdf
    • https://cdn.sqhk.co/ropobemuma/bheihhb/real_followers_likes_comments_for_instagram_apk.pdf
    • http://copyrightsupportforlnstagram.com/bolesefez50y13.pdf
    • https://cdn.sqhk.co/gipudeviwapi/aG7idWu/wepuluwumesume.pdf
    • https://cdn.sqhk.co/xaloridinef/sggjdjj/piggy_book_2_chapter_4_ending.pdf
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/1925cc4de47b.pdf
    • https://cdn.sqhk.co/towinomer/igdTugj/82063072465.pdf
    • http://alisabor.design/falapevisosolevoluboginu0cii.pdf
    • http://mkuu.club/36073659293eu88f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f4c8.bin
5415f73d08874a727e56fd2d6626f8c5b0ecd96fcceedab5a70dbb8b5e3f0e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 5164 bytes
font_01_sfnt_off0001066a.bin
eb5cd3946406f2639daf73dc8d9e3457a34a1d72b2342669e9e0def0c797cafe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 10900 bytes

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