Malicious PDF — malware analysis report

Static analysis result for SHA-256 907d48378719bbbe…

MALICIOUS

PDF

92.4 KB Created: 2021-01-06 20:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b1c19130f59f7993dbbc6db99db5d279 SHA-1: a961dfc4973703bdb07d653e28ae22911140f011 SHA-256: 907d48378719bbbeb193545e395475291c088718a9bc5fbf1c86a9aa6bfd855b
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 indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/aws?utm_term=figurative+language+flocabulary+answers In PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/miralemovebukuwux.pdfIn PDF document text
    • https://katubebadidi.weebly.com/uploads/1/3/4/4/134474785/5548285.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/GjcD6ji/15315564414.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/iesbhdI/howrah_bridge_wallpaper_free_download.pdfIn PDF document text
    • https://bofazereb.weebly.com/uploads/1/3/4/6/134675062/582e383c270a0a.pdfIn PDF document text
    • https://kitafawavan.weebly.com/uploads/1/3/4/7/134702073/1819599.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/a5a3abd8-971a-4381-b1e8-d8583afc7eae/18755721914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c938f718-156f-4406-a367-0d0c13449eb9/woodlands_classical_academy_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5593195-9f6b-4215-b30f-b4b0e5390aab/kowokug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adcf019d-6d50-4ce8-98a8-b3dd13bc9323/area_of_a_sector_radians_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/job_application_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c19db3-b3f4-464c-8dfa-96c95560b070/ariens_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29829c38-3b3e-45ca-bb35-93a05ba1f243/head_basketball_game.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/download_mobdro_apk_for_firestick_with_no_ads.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_off00012bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBF 5396 bytes
SHA-256: c2a5c400ede4f784c8eee555b0e45bfc3280a3c4fb1b2262d2c5b4fc5ea52bff
font_01_sfnt_off00013e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E52 11240 bytes
SHA-256: 2eb0daeb1cc05a7cf23a5444211dc38a108d62c7e8b75a9524314b76f12b57cf

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