Malicious PDF — malware analysis report

Static analysis result for SHA-256 358e47854d969248…

MALICIOUS

PDF

88.1 KB Created: 2021-03-25 14:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 109c4451b46ec5291508ff8c94ba4e27 SHA-1: b710304ce908b356489b69f52e8a1ecaf7d99966 SHA-256: 358e47854d96924846f3bafee112bf4eaf1b8620b246c752db76810de823648d
136 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic points to a phishing or malware distribution lure, specifically using the URL https://seumenha.ru/wix?keyword=tws+i7+battery+life to redirect users. While no scripts were explicitly extracted, the PDF structure and the nature of the redirector suggest it's designed to lead users to a malicious payload or phishing page.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/wix?keyword=tws+i7+battery+life PDF link annotation
    • http://leree4.club/why_does_my_vizio_soundbar_keep_disconnectinglk7ry.pdfIn PDF document text
    • http://waystep.site/3ds_max_error_code_5100iweq6.pdfIn PDF document text
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/5822490.pdfIn PDF document text
    • http://gnoogle.site/fibujibazebekusisoforhugw.pdfIn PDF document text
    • https://menanolunum.weebly.com/uploads/1/3/4/7/134754058/72ca27ce4c820b.pdfIn PDF document text
    • http://bcipreactivaperu.com/79764059912vg6lu.pdfIn PDF document text
    • http://activa-fb.com/tadafifiwosaletuzuxeiv8h7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofuxolisemaxim.epizy.com/womens_attire_for_formal_wedding.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/minecraft_bedwars_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/complex_ptsd_diagnostic_criteria_icd_11.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/que_hace_el_acido_clorhidrico_en_el_estomago.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_ba7275f58c274e47a7b6e81bed75270f.pdf?index=trueIn PDF document text
    • http://xajovezosesazu.epizy.com/kubikiduzuwob.pdfIn PDF document text
    • https://291e86d0-b4b7-455e-aeca-30cd05102b29.filesusr.com/ugd/384a46_fda2f1ca62cf4dd1bd532a6ad28fce0c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nupotukig/91912318425.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/66389043893.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/premium_adobe_photoshop_lightroom_cc_app.pdfIn PDF document text
    • http://lopasunekog.rf.gd/advanced_analytic_methods_in_applied_mathematics_science_and_engineering.pdfIn PDF document text
    • http://surotatifezuxe.rf.gd/bejeweled_3_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/wejero.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 5124 bytes
SHA-256: 53ff517f0bfa5637946c901ebc2ba0041fa3440d6814073b83ec38497fe77b9c
font_01_sfnt_off000108df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DF 2828 bytes
SHA-256: f894870f20f09895cb561e740d1628c512beb325e1c0dc1fc09479789750cf2d
font_02_sfnt_off000114f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F2 11376 bytes
SHA-256: 3c9748ea7fc9abe1f931dd97102729e6dc5e9e335f0b19e445485455bacaaf8a
font_03_sfnt_off00013c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C09 16544 bytes
SHA-256: 8d45f5f417e74c11d54eaee7138901bb4b2498e40dea16ccf89f2c2707c13e35

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