Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d17b2b0d2350841…

MALICIOUS

PDF

87.3 KB Created: 2021-04-07 09:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7f335d23c0faaf3543c2012a33ecf5ff SHA-1: a8ec23059802b0b5a926c4a0060afd9207f8815f SHA-256: 8d17b2b0d2350841f9d7c495049e49b8037eae3870f8fccb7b02fdc14d52fb90
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The presence of 'utm_term' parameters in some URLs indicates a tracking or campaign-driven lure, likely related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://vilenefex.ru/123?utm_term=brilliant+premium+apk+2019 PDF link annotation
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/tajive.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/90044362588.pdfIn PDF document text
    • http://chtotakoebezuz.biz/a_smarter_way_to_learn_html__css_download77sje.pdfIn PDF document text
    • http://lbaranaydin.com/19708398118uujkj.pdfIn PDF document text
    • https://tumipipap.weebly.com/uploads/1/3/4/5/134598024/907906.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/59884052424.pdfIn PDF document text
    • https://tipepopodotojo.weebly.com/uploads/1/3/4/6/134636352/145305febc6e.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/dzhhiWT/railroad_crossing_gate_mechanism_for_sale.pdfIn PDF document text
    • http://zurujavurobe.scienceontheweb.net/51888898647.pdfIn PDF document text
    • http://tryporte.xyz/dish_hopper_with_sling_upgrade_cost53frx.pdfIn PDF document text
    • http://roselosudeve.sportsontheweb.net/tukudeperavivizuvurataj.pdfIn PDF document text
    • https://cdn.sqhk.co/vivokunavu/icb9Grf/photo_editor_free_website.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/nafijitoba.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/what_is_the_purpose_of_literature_in_our_life.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/gdWFge5/18508879455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_6023dd935305a.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/toxujoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488804/normal_6014abdf1cc51.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/teacher_self_evaluation_form.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/bevizurijunufegaje.pdfIn PDF document text
    • http://vulgargirls.fun/21543703009y6x1k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_600f9e1661370.pdfIn PDF document text
    • https://cdn.sqhk.co/givefugonuw/jfjdEgc/punctuation_correction_worksheets_ks2.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/hhsD0ij/the_eagles_biggest_hit_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 4364 bytes
SHA-256: 085352f75660ce1cc0ef387c7316a0bfe8852722233a84d8bbba3e29a5b1d353
font_01_sfnt_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 5384 bytes
SHA-256: 19d64981defb990d69b58e74f115f3fc898773dcf68addd56e47b34da0ef31e7
font_02_sfnt_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 1964 bytes
SHA-256: 1d18534733479c870a78c46a90b83ed8aff410c3511f6838c5b83347f92bfa48
font_03_sfnt_off00011184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11184 11276 bytes
SHA-256: c7261c667aac9ff7616ba8b310c62edc049949b933af5e914151a1e1aa0285a6
font_04_sfnt_off0001386a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386A 16080 bytes
SHA-256: b505b0b78a03edf4fb956c728891bec86144e12ded48a11ec23002336feffae8