Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a3467176171e6f…

MALICIOUS

PDF

79.3 KB Created: 2021-04-30 14:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a80baf879365c6424c58d5789e1f0024 SHA-1: 9b7482a0fbaec6f355699d486d3db3d7db256abd SHA-256: 93a3467176171e6f4da91a9c1e184e9bc30b48ca90bfd9b339e484429ffeb4e1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/strik?utm_term=how+much+is+trampoline+in+nigeria PDF link annotation
    • http://hopecommunitynaz.com/download_game_winner_soccer_evolution_mod_apkpdcwq.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/oEekMRG/88694658310.pdfIn PDF document text
    • http://trylait.club/the_16_personality_types_test_downloadcr06t.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/BRmEidL/lucky_lanes_bowling_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/gd3T5ie/uae_exchange_online_kuwait.pdfIn PDF document text
    • http://kupiokno.su/399288087396h34t.pdfIn PDF document text
    • http://normal-id.com/a_first_course_in_complex_analysis_solution_manual42j1s.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/gc3ihic/flow_online_top_up_saint_lucia.pdfIn PDF document text
    • http://berkeciftci.net/pumagadu0wson.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/51045202787rpaw0.pdfIn PDF document text
    • http://digitalmedialit.com/lobugigiqnwbr.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/RIhfhaS/2255851383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_59e050a381ff4645874624e2a253e881.pdf?index=trueIn PDF document text
    • https://8717ace1-8174-44a1-9f98-e7cbf9e9ed94.filesusr.com/ugd/14e3be_782b1cccdbba40f496681fd42f7fabaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/3413004230.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_141d3dc0861c4bc4be5fe1278af9f6b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomudufe/what_is_a_lawyer_black_law_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236457bd-20c6-4791-ba50-0108d62f480c/48468611734.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/samsung_galaxy_s9_plus_wallet_case_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/bully_mod_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/fabidov.pdfIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_8fc52c088992436ebc01aa3461d238e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b692d19-a828-4393-9506-38574c49516e/technical_and_soft_skills_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f96869-50af-4d98-aaad-08f72c9b7b9c/critical_thinking_book.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_5e2ff291c969406dbf2c264f40fa93df.pdf?index=trueIn 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_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 5400 bytes
SHA-256: ebf3615b1593b9b64489c10c7d10d688395343afa6e2128feab07c9b1345c249
font_01_sfnt_off00010775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10775 11768 bytes
SHA-256: e4c8a8cfa8d30a967b41c35b1cd86801220365ecf2296328b4171d28308e7548

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