Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f41af02f74e5b1…

MALICIOUS

PDF

109.0 KB Created: 2021-03-10 12:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 020ce30d6cd2f16590e7d76f1fc933d0 SHA-1: 583a163eaf2448d341b46b51caee91b4866081c2 SHA-256: 05f41af02f74e5b1b8a859973f3e6b442c73407780003b6cb35198a5abef9002
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=aeneid+online+pdf PDF link annotation
    • http://peludofnor.fun/26340117364jtwyj.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/how_to_find_roku_remote_model_number.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/sherman_alexie_superman_and_me_genrer8flv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449205/normal_6008089d474f2.pdfIn PDF document text
    • http://jumbochecker.com/root_words_for_greavb59.pdfIn PDF document text
    • http://xogefod.iblogger.org/is_cloud9_good.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467287/normal_5ff04b007a8d1.pdfIn PDF document text
    • http://natalifu.22web.org/charmsukh_behrupiya_episode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393925/normal_6001f42312b78.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/breadman_ultimate_instructions.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/the_cask_of_amontillado_reading_comprehension_questionsf5p49.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/7861519f2fa9ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_602213078a0e0.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/calculator_apk_hide_files.pdfIn PDF document text
    • http://specialsale.info/how_to_reset_danby_dehumidifierqlyko.pdfIn PDF document text
    • http://buliwomof.22web.org/credit_mutuel_nord_europe_annual_report_2018.pdfIn PDF document text
    • http://dejevixumuvele.22web.org/dragon_age_origins_dual_wield_warrior_guide.pdfIn PDF document text
    • http://lafilubepojev.scienceontheweb.net/dermestid_beetle_larvae_care.pdfIn PDF document text
    • https://mamudige.weebly.com/uploads/1/3/0/8/130874639/7149408.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/1627829.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
    • http://kopuperoki.epizy.com/cartoon_hd_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001667b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1667B 4248 bytes
SHA-256: e408f90047b5b57c8dea080c90613f99f58cb5c489ac465fbf6245d81d47d5a5
font_01_sfnt_off000174e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E9 10428 bytes
SHA-256: bb4bea98b31d5a4acaf461798267d1226f600eb767b34852d2d7387aa56be9f9
font_02_sfnt_off000198aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198AA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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