Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdbaecd14f57d75…

MALICIOUS

PDF

73.2 KB Created: 2021-04-05 11:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5dea300724671cabc7997abbe3c9d2b7 SHA-1: 88c18996e5d55f2809f298c424ebf4b2b57e8223 SHA-256: abdbaecd14f57d75c4aa89458cb0cb973344d66b49cb88928a8ce58020c8d87c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://midufefew.ru/wix?keyword=california+building+code+analysis+worksheet PDF link annotation
    • https://basosogufu.weebly.com/uploads/1/3/4/6/134682995/fapalubaxalusa-riromubivedoj-wejug.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/how_to_flush_mount_hampton_bay_ceiling_fan.pdfIn PDF document text
    • http://gloslides.com/how_to_use_bissell_powersteamer_powerbrush_4_cleaning_rowsaj38i.pdfIn PDF document text
    • http://vizionsmc.net/super_car_racing_multiplayer_hackje15p.pdfIn PDF document text
    • http://soldonlakewood.com/human_body_quiz_1_answer_keyj8iq2.pdfIn PDF document text
    • https://pixelisikug.weebly.com/uploads/1/3/1/4/131407736/zanimuforaloziwofi.pdfIn PDF document text
    • http://immortal-sho.club/international_gaap_2017_free_downloadvojf7.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/69b1124c-9d93-4857-b69b-598f0a01cd34/excel_date_julian_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf97f96-daaa-4ae1-9d27-9a4e58cad8db/31689373966.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/silent_movie_title_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/97119607483.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/are_the_lord_of_the_rings_movies_on_hbo_max.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/92863629130.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/delegation_list_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/jederodaritova.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/antares_auto_tune_evo.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/45121621284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee1a4ba-f34c-48db-953a-f8697a130cd9/19039719106.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/the_eraser_thom_yorke.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_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 5588 bytes
SHA-256: aac1ce8f56d82461f5541fff2c83abad4d1f69743de32f733d492f91e4065fe3
font_01_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 11236 bytes
SHA-256: 1113514909d2fcb4814f4a1883be962f0ec532605abd73a7b36235253aedcb33

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