Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fbe45ab6f732e8…

MALICIOUS

PDF

82.8 KB Created: 2021-03-20 18:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b1e764df8d13b77730b3eddac76bdd7b SHA-1: 281e90e0bd821abf8971ad3703e97efa2c3ae96b SHA-256: 73fbe45ab6f732e8e126a317b424041eb5b2b80b433d858c1ff347fe88fc5ec6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or further stages of an attack. The document body, though heavily obfuscated, contains text related to search queries, further supporting the lure pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=what+diameter+is+a+224+valkyrie+bullet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fcbec2c86882.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/12998821494.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/how_much_does_a_ps3_controller_cost_at_walmart.pdfIn PDF document text
    • https://teduresusutu.weebly.com/uploads/1/3/4/1/134109172/a7e32b46cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_603552303c0d4.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/cessna_172m_parts_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367944/normal_5ff2d23a49a2c.pdfIn PDF document text
    • https://pizovepe.weebly.com/uploads/1/3/5/3/135323062/viwadirulegakejib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_603454224da7b.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/zemuxad-vojoxa.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/nulufuze.pdfIn PDF document text
    • http://rumepado.mypressonline.com/applied_physics_1_for_diploma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_602411c772d87.pdfIn PDF document text
    • http://didazema.mypressonline.com/zulubu.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/medical_terminology_for_health_professions_ehrlich.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/1026817.pdfIn PDF document text
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/watojidamawunatiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xepatodop.onlinewebshop.net/how_do_you_get_the_gamey_taste_out_of_meat.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/98839027908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0b0fb2-b36a-4d1b-9cde-82cad03b0747/90121760951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5a1eb2-b22a-4b34-9c79-1240d2cfe3d1/tokyo_ghoul_kaneki_wallpaper.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_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 5664 bytes
SHA-256: 17b81daff5b5637c14f8460abc187e2bf252b504c0f6bd8025d26c4f20795bde
font_01_sfnt_off0001035f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035F 10804 bytes
SHA-256: a0106b9b7eb063bb9502334f5fe15c583740637db3c876ae6f8da76f757ec9f5
font_02_sfnt_off0001286c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

Open this report in the interactive analyzer, or submit your own file for analysis.