Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c25d0cc96845c6…

MALICIOUS

PDF

73.9 KB Created: 2021-06-08 22:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 766f88e8e06e9c04c2af0ad173ddc0ab SHA-1: 800f71680eff298920d44e25a9983052568df6df SHA-256: f3c25d0cc96845c687c8e39b7fd2e3ff308200169d3068c4c788d432ad3a487f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URL points to a link farm designed to redirect users, likely to a malicious download. The document body, though heavily obfuscated, contains keywords related to 'earning app download apk', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://huntic.ru/pbw?utm_term=earning+app+download+apk PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudejob.pbworks.com/f/lorimizufesadinuferavowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601af511-87f5-4328-a386-32dd7a5469eb/attack_on_titan_game_free_download_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a7804c-7fd0-42eb-a969-f016bba8c45b/origami_heart_with_construction_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e48c681d-927f-413f-b09c-464931b91b60/15322325334.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/joguzugexurupexanazedoxa.pdfIn PDF document text
    • http://gogoporiwo.pbworks.com/f/82597735347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6436b96-9bd3-4626-838b-79e99d5eccb1/29331748888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c55a24-f825-42e5-9d7b-4b216ab2c34a/60469861373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/713e2b82-18e2-40b0-a9a7-74eff30b6cbb/dirty_pretty_things_movie_analysis.pdfIn PDF document text
    • http://sejiliki.pbworks.com/f/47678387947.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/latest_tamil_songs_collection_zip_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd5d7ee-11d8-4697-8d0f-5deeae38f351/tesla_model_3_interior_lights.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144654312/6_x_9_speaker_cut_out_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6e25c9-ef7b-47f4-97d2-778d3cb729bd/luxadusutulalifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04466f28-5b7b-4f49-8c83-10ac713e8e0b/poulan_p3416_carburetor_adjustment_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165c8ad8-fdd3-452e-9629-19f8aea5f907/pafalifikotuw.pdfIn PDF document text
    • http://joriguzo.pbworks.com/w/file/fetch/144798996/tuvoxitiwujefilevoz.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_off0000e557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 5064 bytes
SHA-256: ce1aa19536862ec1c1a2fc75bb133a2a415f6ae3431bc10ed7e3abccddbb72b1
font_01_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 10696 bytes
SHA-256: b9c34146ecc970a50b554f3907ad8028746eda5823212aa2ea1296633bb8d0bf

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