Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace0e94c0d758bdd…

MALICIOUS

PDF

90.4 KB Created: 2021-03-15 11:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7c6a968d570fcf0f170f07ba69ee92fb SHA-1: 656b0f04ff4dbd94cdcdacbd5aec160659846891 SHA-256: ace0e94c0d758bdddd0f04e3e6f151dae6b2c4b89fbc97e4a82000320c9fcb28
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. The PDF also contains a large number of external links, potentially for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=treble+clef+note+reading+pdf In PDF document text
    • http://reduslimitalia-official.site/how_to_set_sales_targets_for_employeesgg5to.pdfIn PDF document text
    • http://otomail.business/zetukevivolamobeksx2.pdfIn PDF document text
    • http://getsol.xyz/modal_verbs_and_adverbs_ks2_worksheet9xou6.pdfIn PDF document text
    • http://salonly.xyz/90625320641olj6f.pdfIn PDF document text
    • http://susurrus.space/reverse_image_search_android_appne6vd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dce09894-55e7-49e1-9c43-b94069c58f23.filesusr.com/ugd/11ae40_f025d60b28f94a3aa2a4c3e7b718d1b3.pdf?index=trueIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_930a26bcf6d94b09b9e38ef5960894f6.pdf?index=trueIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_e7ac0ea3c2dc4668b13e7010ffbaf96a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/cet_bed_online_form.pdfIn PDF document text
    • https://ac6a5e95-3fab-4d4b-a7e7-0ef4c71e5929.filesusr.com/ugd/32c278_9bc0a71c7a744a8c9b48dfba39e39c9b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/191f3ab6-4a98-4012-bb51-a78ca38daf43/pasazaloso.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_09436d533c7647d498c68448af271b0d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/davorekejasolitimego.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/vuzinelupozuz.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_1a7779301dbd49b28d9f0ca3e0e54ab9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/letter_k_worksheets_for_prek.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/annamalai_song_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/daraz.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_2e5196c1108d49c7a3f1fc02bf0a3430.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_a8ddd5aad9284308a94eab0a9e617820.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/arabic_keyboard_app_for_android_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efef6ea9-7770-4e70-b2f8-c21acaae3876/sweat_app_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede147b1-837f-4545-b0f9-411f2e13527e/93006468669.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/ketuturusozevap.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_3c12ff86f86c488f9c2d34cfca2049d1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f21f9a-4a0e-4654-aa4d-989834841d01/tedukobuwakulorujiw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 5232 bytes
SHA-256: 87f98b2176e2aef60701b93c04538f9ef9b7466f627734d0ff85e77b32b37328
font_01_sfnt_off00012109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12109 10932 bytes
SHA-256: 31538cd0bc77b5ea7b9ba514e461d66ed4dc619905c97bffd82d542fdfd23fcf
font_02_sfnt_off00014680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14680 16200 bytes
SHA-256: eb8728b209634f5cf0dcbccd801eedbe8bc3f4553844c4955f61b377f7da468a

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