Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06c90204c4c4fab…

MALICIOUS

PDF

95.1 KB Created: 2021-03-14 01:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 97232c40e4cfa0b7b4060a4a14c002dc SHA-1: 384f932dc31409981e50ad02db759bd360339291 SHA-256: c06c90204c4c4fabdfa3b260a28d3d14b13be4bc5b9f6e172daa287dbfa740ae
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://baarspo.ru/wix?keyword=dna+cracking+the+code+of+life+worksheet+answer+key PDF link annotation
    • https://cdn.sqhk.co/wazafanez/ihdiaje/tixizeze.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/j0vbVZU/toss_the_buddy_throwing_gameplay.pdfIn PDF document text
    • http://free-at.pro/best_online_brokerage_for_beginners_redditxh0dx.pdfIn PDF document text
    • http://therarbooks.com/34638812278xdigs.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/gQjeOgi/star_football_academy_england.pdfIn PDF document text
    • http://qunit.space/80781573950hjtqb.pdfIn PDF document text
    • http://maddot.space/the_secret_life_of_the_american_teenager_cast_johnozeaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zoburawava/2ihKchh/pro_pinball_timeshock_download.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/i_am_that_nisargadatta_maharaj.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/wEhfljj/menilirororilubi.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/iX8GHhi/xurag.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/naihati_to_bandel_local_train_time_table.pdfIn PDF document text
    • https://cdn.sqhk.co/bitajububida/ijbiagf/tutorial_edit_lightroom_cc_ala_selebgram.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/Yiiig9Z/ableton_free_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_582fe00babb34b2694db4da9fca6d120.pdf?index=trueIn PDF document text
    • http://vimixof.onlinewebshop.net/who_is_the_poorest_rich_person_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4463302e-63c3-4c82-a350-3207ee7e4014/wolinofolapupitapojujim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695f3c20-add4-4b6e-90b0-31fced093747/64540619939.pdfIn PDF document text
    • http://sodowurivav.onlinewebshop.net/disudogugisunupefaramudef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2cf04ec-caff-48b0-a2f9-ba25fe88e76c/28682325380.pdfIn PDF document text
    • https://8994dc82-3839-475c-8de5-8afaa5c13229.filesusr.com/ugd/798b5e_64ee4e22968c44989f3657f6be741ef4.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_5664428b747c47c98aaeafdbe707a340.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_f42e0c272e8f414d8156005b9eef15c6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C84 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off0001367e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367E 5540 bytes
SHA-256: 980922c86ecf395d034aa988dbe3b54f9c6ca33647610d3397a3301dd3837565
font_02_sfnt_off00014973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14973 10152 bytes
SHA-256: 8314fc655861d20a7ba5db1206e917725f91b037966b21fb65a623fb4e84f41b