Malicious PDF — malware analysis report

Static analysis result for SHA-256 97db8ce8f39e30fb…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 16:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 31b0856ab253c4cd80563b42baed02ee SHA-1: 7ed89bf9543fd3100b48c97d7d8a8d14c8731210 SHA-256: 97db8ce8f39e30fbf34b3e2501dd42f972fd1821a7bab77761805cd70a7b6c15
184 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains multiple links to known malicious redirector infrastructure. The PDF structure and embedded links suggest an attempt to lure users to external sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous URLs indicates a redirection-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://dafemum.ru/strik?utm_term=tp+link+av500+management+utility In PDF document text
    • https://cdn.sqhk.co/jebavimot/hgeYggf/boo_radley_character_description.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/igaojbl/47514260572.pdfIn PDF document text
    • https://cdn.sqhk.co/tazurusubiz/Rpiihca/wadetagulaxesaguzavafuv.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/gPyhDjg/peacemaker_full_movie_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamuvovaw.epizy.com/instant_notes_biochemistry_free_download.pdfIn PDF document text
    • http://kekepujubulegev.epizy.com/best_face_cream_for_wrinkles_consumer_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7622d71f-470f-4966-ad19-ebc3d4afda6c/books_to_read_to_my_unborn_baby_free.pdfIn PDF document text
    • http://mapitixonemo.epizy.com/1902930810.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/three_olives_pineapple_vodka_nutritional_information.pdfIn PDF document text
    • https://9aef9be9-4304-4ec6-b02b-ded1eabc5d1b.filesusr.com/ugd/a571b8_5db532f7a4934a6f8b0f374e0f6fde86.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_a4ed63aa9bc94e62846030a26cefa5a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f12d8b8-095e-439b-ad38-2a57f1593b54/dns-323_firmware_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b043c273-5b60-4d13-bd1e-8509d8fd1539/30_day_green_smoothie_challenge_shopping_list.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/bade_achhe_lagte_hain_song_serial.pdfIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_07c54fdff54e4e4e811d458bacea7dd8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixanarer/kagifufivop.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/r_s_letter_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/17641264890.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_off0000eefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFE 5308 bytes
SHA-256: 18c53f7ed52003bf77375f936bbca1626d9b79342bca73840f32a37dc0dc3cf2
font_01_sfnt_off00010112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 10820 bytes
SHA-256: 851d149dbf6fcc70d29ac4dbd35a2eb42c334ef706b73e68ea26ad25ad08f141

Open this report in the interactive analyzer, or submit your own file for analysis.