Malicious PDF — malware analysis report

Static analysis result for SHA-256 b023a51fc871e463…

MALICIOUS

PDF

83.7 KB Created: 2021-03-30 06:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 141463e691e36055523f70a869778b5e SHA-1: 5d0894f4cab7af87ef026b207b5340d4eb99cb34 SHA-256: b023a51fc871e463ca751893e84d20a5c0c157c07d594fdb961ad28d8c197725
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading further malware. No scripts were extracted, but the PDF structure itself is used to host and distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/123?utm_term=jumbling+reasoning+questions+pdf
    • https://kejarokelevu.weebly.com/uploads/1/3/5/2/135297316/jedazajas_wejor_gajetazaza.pdf
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/12e2faca69.pdf
    • https://kanelepamub.weebly.com/uploads/1/3/4/1/134132184/wupisul.pdf
    • http://sacredname.ru/spring_flowers_coloring_pages_for_adultsdx9z0.pdf
    • http://table-wait.com/the_complete_data_structures_and_algorithms_course_in_python_freealasl.pdf
    • https://dumaxenuwumav.weebly.com/uploads/1/3/3/9/133997891/1247790.pdf
    • http://bloodcraft.online/kopipezemukilazinefefajenlwmc6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/30fefcb4-c5c1-4240-9ac3-f3e82d4dd2a6/what_do_12b_1_fees_pay_for.pdf
    • https://s3.amazonaws.com/kufazete/android_1_bowmasters.pdf
    • https://uploads.strikinglycdn.com/files/0553d9dc-b73a-46e5-b96b-47ca3a2a34f2/60867964799.pdf
    • https://s3.amazonaws.com/pasawexawinogad/sefajikabe.pdf
    • https://uploads.strikinglycdn.com/files/46d453a2-7f47-464f-aa22-d36d31e9e999/83072004139.pdf
    • https://s3.amazonaws.com/goviwigax/sik_world_broken_wings.pdf
    • https://s3.amazonaws.com/matogapibelifiv/71193887156.pdf
    • https://uploads.strikinglycdn.com/files/33205b3c-fcfb-4d33-8d40-a41235bd02ea/76501770229.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/tabla_de_pulgadas_a_milimetros.pdf
    • https://s3.amazonaws.com/negonanopix/oracle_database_client_12c_release_2_installer.pdf
    • https://uploads.strikinglycdn.com/files/8410b627-6dc2-43b5-8ea1-9b684591bb0a/19461783698.pdf
    • https://s3.amazonaws.com/fokapikow/19016800379.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/converse_plataforma_altas_amazon.pdf
    • https://s3.amazonaws.com/vuxalirudidel/angularjs_template_inject_html.pdf
    • https://uploads.strikinglycdn.com/files/f623c366-2eef-4b3a-bbb9-556095ee6240/go_math_grade_5_answer_key_homework_book_chapter_1.pdf
    • https://uploads.strikinglycdn.com/files/b4056a64-3474-4f12-8b12-afe1bc764030/latin_american_literature_novels.pdf
    • https://s3.amazonaws.com/kulinisokakewi/st_alphonsa_biography.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010926.bin
ea910f34cb20a91d9c98b6992e3d0c169da0cb03fb140ca59ab8de7f14639c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10926 5616 bytes
font_01_sfnt_off00011c15.bin
78c6a9ed6c81535070f21707c40e69e92e39935e2a3e98c2dd4d8944387d18ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C15 10916 bytes

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