Malicious PDF — malware analysis report

Static analysis result for SHA-256 903c20f906df60d5…

MALICIOUS

PDF

81.7 KB Created: 2021-01-19 10:07:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d098f9842244a579ab57dc82988d5662 SHA-1: 4c6eba4971d726bd811790e33e3b7abaff7d7f73 SHA-256: 903c20f906df60d5d235042f3a164410b28c6b054b6a8b7c1462d79f7715dab2
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains embedded links that redirect to known malicious infrastructure, suggesting an attempt to phish users or deliver further malware. The document body, though heavily obfuscated, appears to be a lure related to vacation packages, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/wb?keyword=cheap%20las%20vegas%20vacation%20packages%20with%20airfare In PDF document text
    • https://site-1171643.mozfiles.com/files/1171643/2019_cardiology_reimbursement_coding_fact_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_5f8f8eb775988.pdfIn PDF document text
    • https://site-1174542.mozfiles.com/files/1174542/most_funny_tiktok_video_in_urdu.pdfIn PDF document text
    • https://site-1168153.mozfiles.com/files/1168153/44201977667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f9173ec46981.pdfIn PDF document text
    • https://site-1168150.mozfiles.com/files/1168150/80204957286.pdfIn PDF document text
    • https://site-1176622.mozfiles.com/files/1176622/mortal_empires_dwarf_legendary_lords.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485436/normal_6001a1048d65a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380384/normal_5fe3e6b425f9c.pdfIn PDF document text
    • https://site-1175261.mozfiles.com/files/1175261/ddpai_x2_pro_dual_channel_car_dash_camera.pdfIn PDF document text
    • https://site-1168006.mozfiles.com/files/1168006/world_war_3_movies_on_netflix.pdfIn PDF document text
    • https://site-1180710.mozfiles.com/files/1180710/55584225142.pdfIn PDF document text
    • https://site-1180550.mozfiles.com/files/1180550/notinazuparazupexunoz.pdfIn PDF document text
    • https://juvikenozenukun.weebly.com/uploads/1/3/4/3/134322787/1368831.pdfIn PDF document text
    • https://site-1173933.mozfiles.com/files/1173933/didi_and_friends_playtown_download.pdfIn PDF document text
    • https://site-1179918.mozfiles.com/files/1179918/text_messages_from_iphone_not_showing_on_mac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/golepe/65547780591.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 5304 bytes
SHA-256: 59f01c91741ce2e2ae1fdf74381895c8fef50e486d28bbd5f38957fc93b65d8b
font_01_sfnt_off0001045b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 11872 bytes
SHA-256: 6c7de7b84ccb7e8f22f8148af6903c66519ba43249254d890a6948b2a3decec8
font_02_sfnt_off00012b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B77 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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