Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ae7cc33d12f5df…

MALICIOUS

PDF

72.7 KB Created: 2021-01-10 11:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 964976e23a221d37a4d2037ae4d5ddd7 SHA-1: c243a3ef821ad4df6c45a5169f065b33fa71d233 SHA-256: 43ae7cc33d12f5df1878e8d83fbfaabfc7b5e1612ba5818248a69d36ad9afac3
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 'traffmen.ru'. The ML classifier and ClamAV also flagged this file as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=change+in+demand+and+change+in+quantity+demanded+examples In PDF document text
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5fd07f84f3881.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/dgigQVe/paint_blast_pro_4x4_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5fa5f1c483382.pdfIn PDF document text
    • https://site-1173528.mozfiles.com/files/1173528/rush_limbaugh_live_today_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479436/normal_5fb38801f3bc6.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/cUjbSnx/677_pokemon_number.pdfIn PDF document text
    • https://site-1177840.mozfiles.com/files/1177840/6x6_pattern_lock_screen_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f8987fc584b4.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/BjgxAzU/sin_pijama_lyrics_becky_g_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422150/normal_5fe6766ee52d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widetunipet/balondu_bhavageethe_kannada_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/23833135717.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/forms_of_mental_abuse_in_relationships.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/borg_warner_t5_gearbox_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/wgt_golf_credits_generator_for_pc.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_off0000ded8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED8 5592 bytes
SHA-256: 8717392f9b6d6a808f2de0cf716c8c84e00efb2c1715a1b31b3513542ca21a3d
font_01_sfnt_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 10580 bytes
SHA-256: 0f199f8b6bd8acf24c724de8e455129faed5fc065b4bf48a5317a98de99dbc92

Open this report in the interactive analyzer, or submit your own file for analysis.