Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06b3e1f2a90edfc…

MALICIOUS

PDF

77.1 KB Created: 2021-04-24 00:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9922c92f1c86f0821212aa738f38e0ea SHA-1: 64462965298ce953965714439a02a878672647c6 SHA-256: b06b3e1f2a90edfcd55eb5fbcbd5697612f683aff3905851a2b1d865855de7ee
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain keywords related to search queries, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=char+broil+grill+cooking+turkey PDF link annotation
    • http://fly-drive.online/belkin_n_wireless_router_firmware_update_f5d8233-4v3xlqtl.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/fijatawititakedetuvufamin.pdfIn PDF document text
    • http://pubgucbayim.com/921880576315osix.pdfIn PDF document text
    • http://kawibijew.22web.org/affixes_examples.pdfIn PDF document text
    • http://sipoxamux.22web.org/service_manual_whirlpool_fridge.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/personal_care_assistant_job_description.pdfIn PDF document text
    • http://zootime.store/top_10_video_editing_software_free_download_for_windows_7s9e9m.pdfIn PDF document text
    • http://migerov.xyz/browser_for_pc_windows_xp_freecehoa.pdfIn PDF document text
    • http://zesaguzijor.mypressonline.com/the_amazing_spider-man_the_ultimate_newspaper_comics_collection_-_vol._1.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/pawobux.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/5742dada-0c0a-4eeb-87d1-1a1da64deeae/the_crucible_character_flaws_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851ac6a8-87af-4f33-986d-c839e1540744/shark_navigator_vacuum_manual.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/austempered_ductile_iron.pdfIn PDF document text
    • http://leveroratex.rf.gd/how_do_artists_use_space_in_art.pdfIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_1ef0f60537244e77b6c036ca8cbeae45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d084e5e-32c1-46f1-94f2-9f41bcf7788b/best_covid_safety_glasses.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/memusaburesumafexak.pdfIn PDF document text
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_2ca8dc12a6754a5b8fc7282bcde73843.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfcd57e-0519-4fd7-8bdb-c09b2e29ff68/wupobenisup.pdfIn PDF document text
    • https://db22a0a0-c6c8-4eb9-9878-037c50d93224.filesusr.com/ugd/e2b5b3_5eb5a718d5d9492aba3c29c5ab486d3b.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_off0000f2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E3 5096 bytes
SHA-256: cf659d0701a7db49c75a5a359797115c0e4b3a4050b5bef05deaae061e55e820
font_01_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 10240 bytes
SHA-256: 9d03e666bf73a28f9296f96782c69fea59cd1d6b9c026ecc7ce0aa16fbd12cc4

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