Malicious PDF — malware analysis report

Static analysis result for SHA-256 21771a87bc94ffc7…

MALICIOUS

PDF

87.3 KB Created: 2021-02-14 18:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9566c3b2216102ca95acff2f75d61697 SHA-1: 293c8495f47d4cb7769b6ea49ef2585c00dbdd25 SHA-256: 21771a87bc94ffc7a61930fb5e2f141effde9db228b28d24b0dbfebec4e2a8af
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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/wix?keyword=cryptic+quiz+answers+5-d In PDF document text
    • https://cdn.sqhk.co/risejesob/jgicsG3/fizefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_6013cc372f56a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488817/normal_6024b856dbfd0.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/twia1Tu/modern_furniture_online_retailers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445541/normal_601841e0239aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60220608d0cbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426682/normal_5fe54003005d1.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/zSjcVhe/cozmo_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/ifibggq/lodanafovejisave.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/dazuxujepov/delhi_belly_movie_720p_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/46955476809.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/whistleblower_complaint_form_intelligence_community.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/17074341289.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/5539060635.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/breville_barista_870xl_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/cc_link_ie_field_basic.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/jonigilove.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/video_instagram_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/xivudinisiduzese.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF832 5080 bytes
SHA-256: 95ce506dd731fefe9b5430812e89c2734d17ec6a14bd20efc95d5d9c42af3e41
font_01_sfnt_off000109cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CF 5356 bytes
SHA-256: f606284242331e479f9907ee0ed74b5a25c504fda4a4a491df35e031d2a1f835
font_02_sfnt_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 10440 bytes
SHA-256: 130a32fd81b018c7c7e0bde55a8c22d3645ba170c908d06506dbc9e0149f3edb
font_03_sfnt_off00013fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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