Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8075b6be46ca6b…

MALICIOUS

PDF

68.6 KB Created: 2021-01-06 09:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f6c5f29355f424a640d4067fe14bf6b9 SHA-1: 232bf266ec9ae85f78563601191f698219fbe328 SHA-256: 8d8075b6be46ca6bf62992150598ca894e820db75ef506e47e3b8c51f8d6d9e7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/aws?utm_term=kinect+for+windows+sdk+programming+guide'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/aws?utm_term=kinect+for+windows+sdk+programming+guide In PDF document text
    • https://cdn.sqhk.co/ludukuni/scnjdgf/superhero_creator_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/hiE5mh0/7411824293.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/ce9df12f-4cc5-40f8-88d2-0c0b9165a51b/rinoxutipidirejuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89797a40-a623-426d-b7ea-57763701f99b/microsoft_wireless_keyboard_800_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37c89c0-a2e6-4396-b369-78d319f5e836/dua_e_sabasab.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/85368158153.pdfIn PDF document text
    • https://s3.amazonaws.com/dirijazi/82856535573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2906d107-51f4-405a-ae5e-491819206a4d/raleys_courtesy_clerk_job_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e667f4f-1ee2-4d0c-9c28-dd52b8fdcbed/csr_2_hacked_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e80ce5-cf49-4ea4-8529-ad91dd349184/filiserunevadupunosas.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/31547851540.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/beckman_coulter_access_2_operator_s_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6edab3-fa51-4864-91fa-2217a29fdb9f/flying_arrow_game_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c7c0ca-1c37-4d66-9988-063342c1fd7c/74989272537.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_off0000cf1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1E 5568 bytes
SHA-256: 539f43ce64caa3b94f1eba81fc2a4d8b8338371161335c042a8ccf485350bc1c
font_01_sfnt_off0000e217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE217 10532 bytes
SHA-256: 2dd799a8943a413a7e946dc6f6ea487663545b1c46ff84a31deb5bb858a3a835

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