Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4002c7adeff42de…

MALICIOUS

PDF

91.3 KB Created: 2021-02-25 01:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e7c2eedeef429ee4866ccc4d0e1ff5d6 SHA-1: a18cc2e37ae9969342555b666cdd6c1c163ad13d SHA-256: c4002c7adeff42decee32823c49a7680268196ea7ceed11a53d653ffeec86b30
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The file likely serves as a lure to redirect users to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wb?keyword=lesson%204.4%20practice%20b%20geometry%20answers%20prove%20triangles%20congruent%20by%20sss In PDF document text
    • https://bejutenexej.weebly.com/uploads/1/3/3/9/133997629/wobelirugi.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/how_to_make_traffic_lights_in_powerpoint3k13f.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/74139503373.pdfIn PDF document text
    • http://topstop.site/copy_paste_keyboard_shortcuts_windows_1095cpf.pdfIn PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/juwupema-taxuborezox-gapobavef-tepaxemolabu.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/letra_y_acordes_de_yo_sin_tu_amor_alicia_villarreal.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/48159091961.pdfIn PDF document text
    • http://fevozogu.iblogger.org/examiner_report_edexcel.pdfIn PDF document text
    • http://mastericy-chistoty.ru/asus_armoury_crate_service46lmn.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/7094243.pdfIn PDF document text
    • http://wuxevonatot.iblogger.org/wijikinomelovigupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gidiletejeke.epizy.com/happy_anniversary_pics_free.pdfIn PDF document text
    • http://lesesopexapawu.rf.gd/26973710752.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/the_city_and_the_city_book_review.pdfIn PDF document text
    • http://najaxobefirag.epizy.com/arbitrase_adalah.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/fewepabojagewaforitivod.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/jbl_xtreme_3_vs_xtreme_2_specs.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/38729504457.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B41 5708 bytes
SHA-256: 197b6ba0eb557509c1bcc66998f31abee28bc70aac7d1eeadaf883f80ca56c35
font_01_sfnt_off00011ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC5 12560 bytes
SHA-256: aa4eb645a730eb4e451cb39c3722393642ce65157e8e3e0834cc1fbb064657ba
font_02_sfnt_off0001492e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1492E 16208 bytes
SHA-256: c668340ea348c6c31d5e51383644f9376ddb5abab10fc4a31907679951a3ddda

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