Malicious PDF — malware analysis report

Static analysis result for SHA-256 d480e5e00f252462…

MALICIOUS

PDF

83.2 KB Created: 2021-03-21 09:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4453de92f7c1bf39ca241a5d21769f80 SHA-1: 59c03be19fb384b7134b468215b884771667e7e0 SHA-256: d480e5e00f2524626ff9f1d3487cc87bda3e94375781050d984fa73d5e9d3ff7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=englisch+%25C3%25BCbungen+klasse+7+gymnasium+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465386/normal_5fcce6f152db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451035/normal_600f718d5466b.pdfIn PDF document text
    • http://xerujupuje.sportsontheweb.net/bunting_flag_template.pdfIn PDF document text
    • http://fepemewavitik.66ghz.com/catecismo_de_la_iglesia_catolica_vaticano.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5ff031ab6e570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_600ad7e06cf11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468837/normal_5fd08f60a47cf.pdfIn PDF document text
    • http://pikogoxo.iblogger.org/fusuzujobamix.pdfIn PDF document text
    • http://zotegomowivin.22web.org/bsc_maths_syllabus_kerala_university.pdfIn PDF document text
    • http://zifeladawu.scienceontheweb.net/aiha_adalah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449009/normal_60103d17aaa5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447079/normal_5ff4b1965ce5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_6048286c0d3c9.pdfIn PDF document text
    • http://dobanojuwelog.22web.org/fujitsu_halcyon_error_code_94.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/watidosudejurapukogetupup.pdfIn PDF document text
    • http://pipavinekiga.mywebcommunity.org/dreamworks_how_to_train_your_dragon_legends_book_of_dragons_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_79195aee184b4a919d3281de7beac865.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_261e03e4c6354085a42799df74c18170.pdf?index=trueIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_842f3b708116418480004aa31cdae1bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/93937485577.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/elric_of_melnibone_comic_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/free_ms_powerpoint_timeline_template.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_850a97737d2b43c99f3856c29dabd132.pdf?index=trueIn PDF document text
    • http://rogomore.myartsonline.com/pitamefexoxofujimejev.pdfIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_5f54adb1b483406c95b1049d276a8f07.pdf?index=trueIn PDF document text
    • http://bubojawafutak.rf.gd/bow_tie_pasta_salad_with_olive_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/my_husqvarna_backpack_blower_wont_start.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/851985485.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_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 5936 bytes
SHA-256: 3aa2362ac28d526a21581b37b7ffc4d87a9f0c33527c92c1b11aa15d66853ebe
font_01_sfnt_off0000ffd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD2 11844 bytes
SHA-256: 12395caf036efd1103814fee5734ec21d34fb88c108d83e5b5811e7ca9ee44e7
font_02_sfnt_off0001269a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269A 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e