Malicious PDF — malware analysis report

Static analysis result for SHA-256 82662d1900986dcd…

MALICIOUS

PDF

77.7 KB Created: 2021-01-07 21:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c1e4b2f743be5f56f5111a85703b975b SHA-1: e1eb5e51bec4be586fbb7e66fc728e6217560727 SHA-256: 82662d1900986dcdeb80f3b8ab32a0a8fb86bfbee4911aebf816f845705fa646
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for a redirector link to a known malicious infrastructure. The ML classifier also assigned a very high probability of maliciousness. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution.

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://gettraff.ru/aws?utm_term=allison+williams+reporter+espn In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/posufij/56868970684.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/teatv_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/week_8_nfl_predictions_2019_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/70280315503.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/bed_bath_and_beyond_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/bulamojinezirikofed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f936dbe-46a6-4517-ad8d-b23c6100d79d/way_of_the_four_elements_revised.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9c60d4-2d19-4d27-8aa9-18b3cf81136a/90006464003.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/16610858073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e0a005-817b-4e8c-ab86-0fd5e9f01e40/lufinisexaxaponunixepelug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb60a676-84fa-4e50-a83a-87a2c6297092/slayer_talents_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/chrome_on_mac_os_x.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_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 5044 bytes
SHA-256: 7fda5feea0af4bc8263e2b85d81c14c79a8344cbe36e28a7468dd6a2a287a173
font_01_sfnt_off0001025b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025B 11476 bytes
SHA-256: 2bb9d75e992039839cf9a3917be96ecc5273aa4f4cd6e02f154a9eb9bfa9bbef

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