Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf05697af64b9de…

MALICIOUS

PDF

110.0 KB Created: 2021-02-20 10:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 586463692a03f6405d0403968c838f38 SHA-1: 81ae26ec6f299939aa784f16c5876e880f97bf3c SHA-256: dcf05697af64b9de419f3c6fa009cf8e113e880667ad7439dc21f7c8c0e38b40
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic firings suggest the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

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 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://crophysi.ru/strik?utm_term=brindle+mini+dachshund In PDF document text
    • https://static.s123-cdn-static.com/uploads/4424647/normal_5fe5543ad71d4.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/j8jgibP/turbo_league_hack_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/jgev4if/83425533907.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/c4067c65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fe5093e0ecb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_5fe99501c11a9.pdfIn PDF document text
    • https://vidolatukala.weebly.com/uploads/1/3/5/3/135316506/6eab1fc3c.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/riwatumokotone.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/ijZLmJF/28412997531.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/2871449.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/Igijjia/luperawesinazuguxipus.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/gijaibB/ticket_to_ride_scoring.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/goalkeeper_with_most_clean_sheets_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/53631597660.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/angular_4_material_datepicker_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/29145995727.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/bauer_bodoni_italic.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/27074177429.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/striped_bass_fishing_report_long_island_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/buffalo_classic_high_top_platform_sneakers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001641a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1641A 4920 bytes
SHA-256: cb01f0b64cc794329a3fa96ee5152f8ba974c3c99217f8a4a406614164f26432
font_01_sfnt_off00017489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17489 11476 bytes
SHA-256: ca0b8e73ae1f77f6bbf859214f7b467a538d9848fe5a295295d1de91582fa859
font_02_sfnt_off00019ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AD0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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