Malicious PDF — malware analysis report

Static analysis result for SHA-256 09498fc0a17ca1c1…

MALICIOUS

PDF

74.3 KB Created: 2021-03-28 14:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e8add38d7f1ee078f6dd84b264cf7aa8 SHA-1: d9812b4e6e73b3d02a0b2a770b38ee1eabbed89e SHA-256: 09498fc0a17ca1c1576e2b2f4ea2edd65c62cb06fe20deeb08d5e4536f1e353d
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the embedded URLs are the primary mechanism for delivering malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/wix?keyword=cc2+chapter+7+answers+key PDF link annotation
    • https://cdn.sqhk.co/bojowagawire/iIy9qji/ladubewifuli.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/hhtjqjf/lepizadi.pdfIn PDF document text
    • http://getchambre.xyz/wametajesamatowufuticum23.pdfIn PDF document text
    • http://organize.shop/ghost_s1_tophat_manualslsgl.pdfIn PDF document text
    • http://sandiego-podcasts.com/poxoxasm449.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/idjcFlx/46153963901.pdfIn PDF document text
    • https://cdn.sqhk.co/nebinefis/aiejdhh/java._lang._outofmemoryerror_permgen_space_tomcat_7_windows.pdfIn PDF document text
    • http://mscredit.info/classical_fourier_analysisskbhn.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/iiKggeb/wikajedizuner.pdfIn PDF document text
    • http://eagleaff.com/43924699574f8dtj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_1daccc97e1c7460784198d178c3a44ef.pdf?index=trueIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_cc1509fcd89a47e0a77954b6fcc94c58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dumupa/tasco_trail_cam_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8d74a0-e411-45bb-a2b9-d2ef3e106ffd/10734766154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b375a66-375c-49b5-a7be-efe32cadb26b/79243550598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80c0d91-b01e-4e19-9266-070d1663784d/72457528230.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/37095284855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9084b5b-6f3c-4a5b-bd8e-2d9452af4db7/how_to_write_address_for_international_mail_uk.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_b6063b0c46c14e3ea24ba90d1efc7dab.pdf?index=trueIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_ab12d7016dd244a09a2b4f1d58fd1c96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a042bb-36ba-4c1f-82d2-a98367463b67/zutawumubamazisaguligule.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/monitoring_and_evaluation_process.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_c9d2fd24ec2944fbba8fb8b7fce425f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5340a7a2-7ae9-48b4-bae6-c916871b2fb0/simplify_expressions_combining_like_terms_and_the_distributive_property_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80452d34-8e70-4085-8fa0-72266b1f8cc8/37434743671.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 5364 bytes
SHA-256: 85fe790e0f50b9cd8d512dc5d6f95e4a67ba3fbd51e73175e53b51f351d850dd
font_01_sfnt_off0000f623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 11028 bytes
SHA-256: 24dadaa57edd367e21bdaeb284b0ac489be81ec5f34c2845c334d48ba6cb1eb5