Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f9ee173623dc6a…

MALICIOUS

PDF

82.3 KB Created: 2021-03-31 01:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a9df293ebb8670834e3e95f21a50458 SHA-1: 23a7939cfa54ca8103ea2c1ab3d6a291d16558ba SHA-256: e2f9ee173623dc6a9de7573d6ffadfaa4c6fc97e6e7be5e07272d3463954b187
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly and other hosting services, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=words+starting+with+letter+g+with+meaning
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/6815890.pdf
    • https://kugibunil.weebly.com/uploads/1/3/1/4/131437599/weposevumiv-mikusep-nosamosefebatak.pdf
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/77fb03.pdf
    • https://cdn.sqhk.co/tagodepa/gGfGhaC/word_search_books_in_bulk.pdf
    • https://cdn.sqhk.co/nixuzosa/Hzlhfgi/pawatipadowitilumanupij.pdf
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/5250860.pdf
    • https://gufogejerujog.weebly.com/uploads/1/3/1/4/131406717/4140001.pdf
    • https://zugatuwedi.weebly.com/uploads/1/3/0/8/130874050/xajewaw.pdf
    • https://cdn.sqhk.co/wejagamewo/ffiiAM9/call_blocking_apps_for_iphone.pdf
    • https://pitidupokeni.weebly.com/uploads/1/3/4/4/134485339/3732014.pdf
    • https://pulolated.weebly.com/uploads/1/3/0/7/130740140/fupebe.pdf
    • https://sojomirolasa.weebly.com/uploads/1/3/4/3/134325131/4703279.pdf
    • https://cdn.sqhk.co/genopeno/fJTiil1/walmart_money_card_login_reset.pdf
    • https://mifuvepezomiluf.weebly.com/uploads/1/3/4/3/134312517/4939239.pdf
    • https://sefaxamijewosaw.weebly.com/uploads/1/3/2/6/132682716/misal_xizebawamidodu_guwelobaki.pdf
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/wirom.pdf
    • https://muwobifuf.weebly.com/uploads/1/3/4/5/134501600/sudufedaf-nupisexisolixim-bomumazeretukuk-kusen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_74fee7e8b15a40fabc65e6831fa9b71a.pdf?index=true
    • https://8f1ef4f7-3f23-41ef-a3d6-4e5873a175a2.filesusr.com/ugd/d318ce_dcdf575db244410798a94f3e921515f5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/95431de6-61eb-4f45-9e3f-e6598e632250/hannah_arendt_a_report_on_the_banality_of_evil.pdf
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_593b1bc18605414bb90ba4c3fca483d8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8754ca2c-64ca-4ee0-b642-f9a245c6d852/java_8_stream_api_list.pdf
    • https://uploads.strikinglycdn.com/files/26eb7ab7-354b-4e19-9f14-fec3d61daa60/why_students_do_not_follow_school_rules_research.pdf
    • https://uploads.strikinglycdn.com/files/60d1db2f-cccf-4371-8feb-51f0828218ca/dozasefanafo.pdf
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_56f9b10b0f7f41e8b07bdaf18cdd631d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f703.bin
e7f3d4202216fe664cbe69603a8c8b8ba2043b7bde78f48c25c6fc029511077b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF703 5132 bytes
font_01_sfnt_off0001085f.bin
c9cfb57c0763f0a0dda3020b2653a34707b84ba780a14230434a045e17507bc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 10884 bytes
font_02_sfnt_off00012d54.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D54 4324 bytes

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