Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5a3f703e49fd72…

MALICIOUS

PDF

67.5 KB Created: 2021-03-21 21:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ace3953c087c784b228dbcc6b36169d4 SHA-1: 2718c42e68a5efe5bf03fdaeca053ae0edc55453 SHA-256: 6a5a3f703e49fd72c1dda174d1082e4a4ffafa0295c6c36c3f70002223ac54bd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also strongly flagged the PDF. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wix?keyword=sceptre+x505bv-fmqr+reviews In PDF document text
    • https://cdn.sqhk.co/rifokinimito/VhbgZFK/battlefield_companion_pc_descargar_gratis_espanol.pdfIn PDF document text
    • http://maewallace.com/tomb_of_annihilation_handoutscltya.pdfIn PDF document text
    • https://cdn.sqhk.co/nudogada/Vjdhbhh/mendelian_genetics_notes_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/ji5jguE/smashbits_minecraft_story_mode.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/hhlGngs/22961896399.pdfIn PDF document text
    • http://nat-fru.space/weponiwoxeloxoweymow3.pdfIn PDF document text
    • http://akfb.online/zikotulc82jr.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/jcjaMhh/whatsbot_autoresponder_robot_chatbot_automatically.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruweti/Uji9vhj/apa_bulleted_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fb5b11-4c69-42b0-9539-ca7c7d230ef5/gomugadaxilax.pdfIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_3ad3ccf6cd474612a91911f933e9ec74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2052ff72-52d1-409b-8e81-07379e7a40f5/what_factors_affect_diversity_in_an_ecosystem.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_29b93c5a89be454ab958d6ce12b0295f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c96acf-edb1-4ab1-9852-d903a459af4c/52336946192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa37a6e-5cb4-454a-9c45-7f706737d86f/14326052380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57dab846-1840-42c3-a5ac-41e5c7f8a42f/ralph_waldo_emerson_essay_self_reliance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f1805e-83ee-482b-94ad-7ec9ebf7e0d6/what_are_knowledge_management_processes_describe_briefly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25194d9b-f318-47f5-b73c-8ea33e00f015/lincoln_electric_ac225_stick_welder_k1170_reviews.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_off0000c996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC996 5808 bytes
SHA-256: bd5a5bb6486e4c340fb018e57b1cc9ba1214ee93a4ccd96b7b5dad3b5cc68194
font_01_sfnt_off0000dd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD70 10496 bytes
SHA-256: 6e53e6454bba1148c64641464dc06937d3deb952c9630bdbd5434fa6f1c8aafb

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