Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81edb19e3f21716…

MALICIOUS

PDF

75.6 KB Created: 2020-12-13 22:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b9d7a13d8645b48fe3fb78c96a52142a SHA-1: 7048a72778e0477c56aff58f0b4f63db912f1298 SHA-256: e81edb19e3f21716734c42f70675c0d801922defc1ecd531beba7686d0ee83e9
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL 'https://trafffe.ru/aws?utm_term=cinema+hd+apk' suggests a lure for downloading an application, likely malicious. The presence of a 'download button' heuristic further supports this phishing-like attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=cinema+hd+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f896a9758641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fbefe87ec52f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5fa9d030b06e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5fa58bfdab646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459323/normal_5fb6a3373bdb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5203dc30a162e0c6de521/t/5fcf1fbeb8233e30dfa4a01c/1607409598465/wiguxakugodon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00a03c6229360eca839ab/t/5fc2710c08845d0924d8dda3/1606578444963/ugliest_wedding_dresses_on_say_yes_to_the_dress.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1e4b7849622016c3bb44/1606229580388/pre_algebra_part_2_final_exam_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30d46116eb00e3c59ffbc/t/5fcbec9336758319a561ae16/1607199892487/plugshare_ev_and_tesla_charging_station_map.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fc236d5173fb5383bec233b/1606563542145/fured.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc69cd5bda9c57a97e5d88e/t/5fcc3ea26f0099009e56c986/1607220899694/keyboard_piano_yamaha_psr_e463.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000d1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B7 6568 bytes
SHA-256: 2ba6e0c4516ae528974428ab90d2fcb845e31fc6427c3681d976df34e50bf0fe
font_01_sfnt_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 4860 bytes
SHA-256: 436f2bb00c7bc36d0a34cbdc98808ca27cdc7e1fdaa028a38f4d1189d1fae0a5
font_02_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 3080 bytes
SHA-256: 27cf5fc684fa109ec66a87b72131bfbc603916445c982a41a0e5bd4b98e62367
font_03_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 10224 bytes
SHA-256: 64c16d12928984394ba4ec1a24aa3986d29eeaeae9c8f8a68194156578f74bd9

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