Malicious PDF — malware analysis report

Static analysis result for SHA-256 db01a1d188b2b12f…

MALICIOUS

PDF

81.5 KB Created: 2020-12-28 19:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1a5ed9fb35a73fb96606cf0b3f30c6a5 SHA-1: 91f36109e1cca27fd8f7a3d1834b8d69d7fc8079 SHA-256: db01a1d188b2b12f65fdc442ae2bd1b6489363251d722c2701e08875e0e44abe
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of a large number of external links suggest a link farm or phishing attempt. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

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/123?utm_term=multiply+two+binomials+calculator In PDF document text
    • https://static.s123-cdn-static.com/uploads/4367648/normal_5fe2dce25ab78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496580/normal_5fc9d8df97be0.pdfIn PDF document text
    • https://sokonova.weebly.com/uploads/1/3/4/3/134322069/3797e6f5fa.pdfIn PDF document text
    • https://bunewifuji.weebly.com/uploads/1/3/4/7/134709558/boduvesufo.pdfIn PDF document text
    • https://bozalugim.weebly.com/uploads/1/3/4/3/134343660/6723533.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/1adbaf0e-9b0c-4dbc-922f-12618bb1906d/chaos_index_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b3cb1f-6af0-481b-9463-bd471e65fb3b/29712692030.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/53290658504.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/adobe_animate_ad_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09726cba-0a3a-4be6-aa48-49ce2c162d0e/tabudutudu.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/ac_market_apk_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/54765984830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21e768f-d33b-44e1-9502-e1a61b67d10b/lewavojowaduto.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/91850081054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23e7d4e-ba57-4afe-8db8-4698e3f9baec/18500876581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5162a15-5f40-4895-af54-ffc475e64a96/dwyane_wade_stats_with_lebron.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 4968 bytes
SHA-256: d02fa3ca523333f88690e1ce92b0df0136b88c33456fc35c30db7bfa9e2ee269
font_01_sfnt_off0000ea62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 5420 bytes
SHA-256: 96c8cdda7312c91b17c01216f07d5104f8729ae66cfe05fd22267dc6d4b766ed
font_02_sfnt_off0000fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 11172 bytes
SHA-256: 294797a6a2d6d9cbdf48a0836949c3607c68e134faf1d5b292dd1b12c0329b7c
font_03_sfnt_off0001235a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235A 16080 bytes
SHA-256: c0982807324681c2194e80f3f637ca3700f5bf2c32718b44bdc390b4bb628087

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