Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed3751305723ac5…

MALICIOUS

PDF

87.0 KB Created: 2021-03-16 21:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 70bc8948e6b6ad683e1c1f2d3f10323e SHA-1: 9cc768646fa451ad73313d250a4e72b5e8542b8a SHA-256: 5ed3751305723ac565ba1ffbba668d7febd9bf6b6eaf4890c27aa166f0fbac30
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious redirector links suggests an attempt to lure the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=fs+geometry+eoc+review+answers+key In PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/how_much_do_nfl_officials_make_for_playoff_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_6028570843051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_600d1aa857294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_604661d20a582.pdfIn PDF document text
    • http://weridif.medianewsonline.com/como_resolver_integrales_definidas_paso_a_paso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_604d97b837d87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_600c3ce49e789.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/sarutawupizidopifer.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://dujabonesisu.rf.gd/past_real_conditional_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b786f0-4596-46c5-812d-4d973e4b0fa3/sutigiv.pdfIn PDF document text
    • http://kikexufan.epizy.com/deformed_babies_chernobyl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b869461-840e-4b3c-a8d7-0e0b0b0b9f8b/77323791257.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/amando_a_pablo_odiando_a_escobar.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/dead_men_s_path_achebe.pdfIn PDF document text
    • http://lusalelafujijo.epizy.com/balak_palak_full_movie_free_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859ae343-0479-4416-9fb5-323d81bcf730/nufij.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/85263563735.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/locked_out_of_heaven_drum_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/84363818829.pdfIn PDF document text
    • http://pekagotikoweguf.epizy.com/cunto_tiempo_tarda_un_cuerpo_en_quedar_en_huesos.pdfIn PDF document text
    • http://likefiradoweze.rf.gd/think_of_me_phantom_of_the_opera_easy_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a2c55f5-9196-442c-8226-b317230a1bc9/alcatel_one_touch_idol_3_5.5_caracteristicas.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/farodosarogelodafuv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 5016 bytes
SHA-256: b6504ac06f2c41f24cd1bee7876579d38f9f3e41f719a2bb4bf694e974a0e74b
font_01_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 5148 bytes
SHA-256: 6b2ea1b46afe0bf46eda31e2553bf10472b07566a3f140b4d39b9e5142f9caf5
font_02_sfnt_off00010484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10484 10924 bytes
SHA-256: 7ba17efd0712fd924daacb2f44cffd560a50a2247bc668ae264a30a60ce76710
font_03_sfnt_off0001298c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 16244 bytes
SHA-256: 037e2f5e063df8c8a7ace99eda0760ef0c71f40fd2fe6b00a4726886f8dbd875
font_04_sfnt_off00013ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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