Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7a32594e796021…

MALICIOUS

PDF

80.8 KB Created: 2021-04-07 13:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e28e7204a9b47a99ba2faf35009cc05b SHA-1: 96519f3ea6bb6e7f877029e6d2c943c3b87acc28 SHA-256: ee7a32594e79602191b11c4b337bd37cae81aacc24ac4674b11a04943a58c172
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It functions as a link farm, containing numerous external URLs that point to other PDF documents hosted on various domains, some of which appear to be disposable. The primary URL observed is https://maypoin.ru/award?keyword=empty+bingo+sheet+pdf, which is likely part of a broader SEO manipulation or phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/award?keyword=empty+bingo+sheet+pdf PDF link annotation
    • https://wemubutuve.weebly.com/uploads/1/3/6/0/136090051/5611193.pdfIn PDF document text
    • http://xofitazuregokud.mywebcommunity.org/podumipuduzatujukul.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/jiajcih/sms_ringtone_funny_tamil.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/altistart_48_user_manual.pdfIn PDF document text
    • http://sokenogatime.iblogger.org/8086_assembler_tutorial_for_beginners.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/8743970.pdfIn PDF document text
    • https://noguzijevamemid.weebly.com/uploads/1/3/4/8/134890426/77ddc9019bb5357.pdfIn PDF document text
    • https://vaxokivov.weebly.com/uploads/1/3/1/4/131453734/8299615.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/Gt6Djab/41469521098.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/ggc5jhA/59987983216.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/believe_me_if_all_those_endearing_young_charms_euphonium.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_cc5620226fa2470e9750cc8b9510a989.pdf?index=trueIn PDF document text
    • http://kapirexazi.onlinewebshop.net/liruwabir.pdfIn PDF document text
    • http://fegugeg.rf.gd/joxib.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/acer_palmatum_bonsai.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/bordered_hessian_determinant.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_c42ce21075a341e58def3768e8effc3a.pdf?index=trueIn PDF document text
    • http://fanalejowegop.atwebpages.com/23763564039.pdfIn PDF document text
    • http://mogixos.atwebpages.com/86551023026.pdfIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_f8fd1b1325824ded9a62c6f014e2efc3.pdf?index=trueIn PDF document text
    • http://gedokimisizat.rf.gd/all_in_one_box_pro_apk.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/adestrar_cachorro.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10001 5316 bytes
SHA-256: 122e5313424aea5810fad97e0431ee1e1ed96fc0a1ad3dc01dd35bdd750f5781
font_01_sfnt_off00011203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11203 10472 bytes
SHA-256: c82754bdac8ca021bd02e85d78b86afbfd635ccb746968275fe8b0084ee0c0fa