Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b482294a87866f0…

MALICIOUS

PDF

74.4 KB Created: 2021-04-26 21:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 507002692c61995861ccaeb46625ad25 SHA-1: 94845f7241e7b141979a32e91137ed99eefe0c41 SHA-256: 6b482294a87866f04c72d3bdc89fd270bea7038a231ade1a294700c7ceaf946d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and a link farm heuristic further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/strik?utm_term=crazy+love+lyrics+michael+buble PDF link annotation
    • http://lamovingcompany.com/how_to_calculate_spellcasting_modifierxhoss.pdfIn PDF document text
    • http://iciapp.xyz/best_android_apps_2019_xda3aki4.pdfIn PDF document text
    • https://cdn.sqhk.co/sogupavetut/WrjbaNK/zekev.pdfIn PDF document text
    • http://familyit.info/141214018357awi1.pdfIn PDF document text
    • http://silkhfig.bid/69916776258plnwy.pdfIn PDF document text
    • https://cdn.sqhk.co/vulasobifow/agiqs6k/graphing_linear_equations_and_inequalities_worksheet.pdfIn PDF document text
    • http://stickerrus.ru/the_alabaster_girl_epubnxhyb.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/OHk9Hhh/birthday_cake_recipe_for_dogs_and_humans.pdfIn PDF document text
    • http://all-system7.xyz/on_pipe_apk_indirimr9mlh.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/gwie1VB/wanumakabukifokebafum.pdfIn PDF document text
    • https://cdn.sqhk.co/nabaxifow/whgjbhg/tap_titans_2_best_artifact_to_level.pdfIn PDF document text
    • http://dkblogin-de.best/how_to_start_windows_8.1_in_safe_mode_from_command_prompt91kmm.pdfIn PDF document text
    • http://begdas.fun/938088906764benm.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofoziga/gchfHji/azadi_movie_songs_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1e2e1d2f-e5bc-406e-8ade-c93a3c5db6fe.filesusr.com/ugd/81c7be_67165c95ef4749a495115a7aece7738c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa27dcc-b9be-40cc-828d-aad16add19b4/tebedifivutoxezonilib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda8c2fa-34f1-4e00-827a-49a8c3906735/what_essays_are_on_the_common_app.pdfIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_802a1ed4f8744fe186387622529040b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b80d78c-e65c-433d-95cb-c135178603df/sql_dba_books.pdfIn PDF document text
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_2676e7e3722042218ad0b50dad1f476b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e809bb09-897d-4ddf-9189-a4ef94ba38dd/guwowasitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180a4cfa-5a56-4390-b093-5f8b5008e2bf/nilojoleboju.pdfIn PDF document text
    • https://19eae752-0dc2-40b2-988a-3ead9c543f91.filesusr.com/ugd/dee0a8_1abd910bce174339b6e118ad9cca31a0.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_off0000da1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1A 5112 bytes
SHA-256: 12ef6238d94f98119e9dc4de1b66000fbbfbc1d29f8d2e3a238f41aa642df6ae
font_01_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 9992 bytes
SHA-256: 40739d6f472b205964246ae1aa43bc17f72e32abdcacf23da4fdeebc046b10fe
font_02_sfnt_off00010d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361