Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb7f356c49c18a7…

MALICIOUS

PDF

68.2 KB Created: 2021-03-22 01:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f8f6af7fb310525637b211b05a712870 SHA-1: 4de55163646e0d71e887feb5eec359fc42ebc1e9 SHA-256: 9cb7f356c49c18a70af196aa019ed6425fbc69ea9bda77c0ef308240aed11ac6
126 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 ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains embedded URLs that redirect to a link farm, suggesting an attempt to distribute further malicious content or phish for information. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://fokemale.ru/wix?keyword=medicine+cards+pdf+download PDF link annotation
    • http://fuxezaboxekave.scienceontheweb.net/befemevixadu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459326/normal_5ff25282c2050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_60461c1b6f414.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/surijutox.pdfIn PDF document text
    • http://pajelonagij.iblogger.org/figubalumogenomivawa.pdfIn PDF document text
    • http://lafuvenilimagi.iblogger.org/fortigate_100f_datasheet.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/date_a_live_encore_3.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/JjjiicE/cross_stitch_world_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/TheQn6b/beard_styles_for_round_face_and_bald_head.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/ieomMGQ/11119653117.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/cibhgz4/avi_one_square_bird_cage_with_stand.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://penanaras.myartsonline.com/hallelujah_lyrics_and_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94d764a-6b9b-40b4-b1d7-21a70252bd08/how_much_does_a_tesla_model_3_performance_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80722012-86ee-4047-bfad-023449b5ca2f/paguresur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3360f3-c699-4781-b353-0e51971bece0/tokyo_ghoul_season_1_wiki.pdfIn PDF document text
    • http://lawuzuzadi.rf.gd/34266000750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb56d6d0-3bf9-480b-b62f-a3332831b880/the_african_american_odyssey_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236a7043-9198-400f-9383-4dc5f69662ed/mabanudosag.pdfIn PDF document text
    • http://guseboses.atwebpages.com/rezudedezo.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_off0000ceb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB4 5244 bytes
SHA-256: 33024a337d092aa4fd1091c625614126104dcd75cea9dee95d809b37ce351681
font_01_sfnt_off0000e0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 10216 bytes
SHA-256: 2a7aed055d6202c1c01709c479959ac1427866858da98275a1b6be0ccdee118b

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