Malicious PDF — malware analysis report

Static analysis result for SHA-256 116336319bdc4770…

MALICIOUS

PDF

83.8 KB Created: 2021-01-31 06:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a5061006217bd69ae01fb80636bc0492 SHA-1: 736822aa4f6b4444bddcac94bfea5c085981693c SHA-256: 116336319bdc4770204c1fd95c2c2226ecbbeed3df77f1aa48ff85495d9cedbf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query. ML classification and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the embedded URL is the primary indicator of a phishing or redirection attack, likely intended to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/123?utm_term=shakespeare+sonnets+summary+and+analysis+pdf In PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/NRgeijW/warlings_armageddon_hack_apk_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/c0APqii/26630135084.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/zicx0dF/primeval_movie_download_720p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_6012c72610fa4.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/Khhgwjb/my_connect_kingston.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5fe973bb81543.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/8igYmhe/function_generator_kit_with_xr2206.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/LWTljdZ/furious_racing_3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/5_year_business_plan_template_uk.pdfIn PDF document text
    • http://pasazaxara.rf.gd/xujabojujojosen.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/android_browser_support_extensions.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/tuxabivozusawagoma.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/sifajabubuxo.pdfIn PDF document text
    • http://dopodisimedu.epizy.com/animal_crossing_new_leaf_train_face_guide.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_off00010944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10944 5548 bytes
SHA-256: 69707ec8cdfb26c0992b2b4b7fb6e1748ead6e64303f0715ff78d52ea6092a3b
font_01_sfnt_off00011bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFF 11316 bytes
SHA-256: 26089533bac521c00ca66b715d62e24127a23f78284361d5fe7860cb2023188c

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