Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d0d88456f19396…

MALICIOUS

PDF

88.2 KB Created: 2021-04-30 05:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 790f60fd224b4d7a50ee3f3380da1d7d SHA-1: 565fc54b0be6aa794c665db7f624617f36395850 SHA-256: d1d0d88456f193967c076c6310582456ff91c5a3980480b3c95385d7330e29e6
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to documents with book-like titles, suggesting a link farm or SEO manipulation tactic. The presence of a download button lure and a critical ML classification further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to potentially malicious content or facilitate further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/strik?utm_term=excel+vba+for+loop+over+array PDF link annotation
    • http://1xbet-regi.site/self_guided_walking_tour_ho_chi_minhuh3lu.pdfIn PDF document text
    • https://lagonola.weebly.com/uploads/1/3/4/8/134851586/madusudo_nudegonuva_manetubus_sufunojis.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/aashto_lrfd_bridge_design_specifications_6th_edition.pdfIn PDF document text
    • http://terugate.mypressonline.com/30444982721.pdfIn PDF document text
    • http://firobazotu.sportsontheweb.net/73286935676.pdfIn PDF document text
    • https://zuzolavilasobin.weebly.com/uploads/1/3/4/5/134523903/2822149.pdfIn PDF document text
    • https://nokajaxupi.weebly.com/uploads/1/3/4/7/134715681/dulugun.pdfIn PDF document text
    • http://senteber.site/rukesofiparofozutapubusik8w3pb.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/paruxaminofagal.pdfIn PDF document text
    • https://kanemonel.weebly.com/uploads/1/3/5/3/135319287/9880399.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/jiradamad-rotalobutur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e63c17-8167-4053-b577-d73f49e92f8c/first_aid_cases_for_the_usmle_step_1_fourth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/43350878676.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/dave_brubeck_take_five_album_cover_art.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/68689716622.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/lejinijamupuxemo.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/kadutisadux.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/gadasu.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/how_to_get_unlimited_money_in_farming_simulator_19_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/27807319575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac2c404-f556-4f77-8253-928e962fff12/82016408695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b932e796-9454-4847-83eb-241345e087ef/vikutanibufa.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/the_cake_maker_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/gw2_gesandten_rstung_2_guide.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_off00011b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B64 5160 bytes
SHA-256: a27c1812c7997360056fece0f7b8cca7f1e43a7643c65344e9cc7c2bdc002dc4
font_01_sfnt_off00012d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1A 11380 bytes
SHA-256: cebbc450e1aa1e3ebe462bd61b60fa185141ab87def1563b04eaef8c8ba40b8e

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