Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e8fc3f553e6533…

MALICIOUS

PDF

70.9 KB Created: 2021-06-06 08:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e1d3f8da918b1a5ea98694229e720927 SHA-1: e9fcb43120b90df05adb2349cf515524c314b36f SHA-256: 54e8fc3f553e6533e4b967729b6ea77ecee0afa53fff56cceef6baf102ecb2e1
156 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 ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous external URLs, a common tactic for phishing or SEO manipulation. While no scripts were explicitly extracted, the presence of external links suggests an attempt to redirect the user to potentially harmful content.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/123?utm_term=jlab+sol+answers+earth+science PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482426/normal_5ffa74d1595dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490929/normal_5fe9d62072946.pdfIn PDF document text
    • https://tuvomirunasoz.weebly.com/uploads/1/3/4/3/134324776/672218.pdfIn PDF document text
    • https://kawuzuke.weebly.com/uploads/1/3/1/6/131606938/jovatuburi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_605aa5257bf7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_6016ebf2f00e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8116f8fa-8e16-4a36-97c0-af44cc2efc5d/space_flight_simulator_full_version_ios_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b517927f-c2b0-44fd-b5e5-ca0bcb82ce56/duxezutesogokitubular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49af533-9335-4fdd-b747-03910a545585/26809362514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6912c0c2-0fc0-4d20-b19a-c2ba698e38c6/does_roku_ultra_have_the_xfinity_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1333855d-6266-4fc6-8d94-972cff677a3d/xpmse_belt_fastened_quivers_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea33533-3d5e-47b7-a9d9-570fbf9c9121/gfta-3_scoring_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b0323b-db9f-4d82-a684-6178b2c880e4/mtg_fingertips_biology_free_download_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941ad17c-9447-4035-8d66-d15b1b946f48/51948225974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3af28f4-0885-495d-b405-0cb2b4bad418/doorking_1834_vs_1835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947eb832-0ef7-4f99-85d0-6235cc2c3e0b/72757820657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc1fef4-d216-4d16-b679-881ad78b3483/how_to_program_xfinity_xr2_remote_to_vizio_sound_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a511ef-2c56-4d21-bf4d-512b18ba9a1e/36675724391.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_off0000d7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B0 5108 bytes
SHA-256: 96e3deae8abccf62fa21be313ac758785e038728c4ccb65669c30c9bf1781192
font_01_sfnt_off0000e91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 10480 bytes
SHA-256: 17a7c46c29e4302c311ef425043eb252cdde655d8e292c6e637eee78c8e27611

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