Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf829eba7b74d9c…

MALICIOUS

PDF

84.9 KB Created: 2020-11-25 19:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d93b9ee4e3a68c1888f536ee0614c1c0 SHA-1: da3c247d13d64fc5149ebd525c83c9b2a6594d72 SHA-256: fcf829eba7b74d9c2973c008662010b4c59fb302dcf49e1c7d390f73a247ac2f
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=armored+core+5 In PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/5a2e371a.pdfIn PDF document text
    • https://fezawajudew.weebly.com/uploads/1/3/4/8/134896424/modigimarikerilus.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/padaxibaf-molubomemuzevux.pdfIn PDF document text
    • https://lawawumusew.weebly.com/uploads/1/3/4/7/134765042/fomatadoz_dubekan_bulenabakimum_lexifiboged.pdfIn PDF document text
    • https://defonufagij.weebly.com/uploads/1/3/4/3/134360363/37f892374.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/0b8a5b99-f822-488e-b9a4-05d56e8795de/restocking_guide_neopets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f19abb-270d-4a9b-890a-c08c41abbda1/kung_fu_massage_milford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0dfd1c-fe1f-40ce-a82e-271d04a406fe/fitudoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8bf135-a8eb-4011-9b96-175e55303abd/examen_extraordinario_de_matematicas_3_secundaria_resuelto_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72aec30b-9b49-45f3-bb8c-8fe8f15dd9a5/questions_to_ask_a_professor_about_a_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1abb6fda-e3ba-400a-a0eb-817f0e08a6ce/unblocked_games_66_rogue_soul_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/commanders_of_evony_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cac3d39-cfc5-4645-ba52-f23fb949030b/to_critique_a_text_readers_blank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2dc28bc-cf19-488d-9e21-33ef8d9f144e/main_mera_dil_aur_tum_ho_yahan_free_mp3_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 4140 bytes
SHA-256: c16329ac2719fcfce7bb55d8b42462e3c9791949e9a25ad0ea056c35f1db62fd
font_01_sfnt_off0000fb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB26 4776 bytes
SHA-256: 362049e716efad69de507782dec1d0f864bfdc0672bed53bb01c8f3eeb4845e4
font_02_sfnt_off00010b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B50 10624 bytes
SHA-256: 0fbbc9fa77bf6e8c29ab07ebba4ff2c80e2a54ebf498e9e40bd7c61a20e06189
font_03_sfnt_off00012fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCA 16076 bytes
SHA-256: bfd5fcdb7495bed175e4f51938194e2ecb7e505d90535bc2124716332a04a4ab

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