Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd22b7ce573e8c6…

MALICIOUS

PDF

48.9 KB Created: 2020-10-31 05:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b95e4efc133b15bafc997530ae71cd20 SHA-1: 3844197ccad8fb3cfb4dd26aed0d3d2665c077ed SHA-256: 6cd22b7ce573e8c65ee592deb6bd90d66fab724e3509892875fa478957d8f426
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to direct users to malicious infrastructure. The presence of a 'download button' lure further supports this. Although no scripts were extracted, the embedded URLs and the ML classifier strongly suggest malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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
  • 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://gettraff.ru/123?keyword=xnxx+video+download In PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/kurenetuluve.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/413d1e90e525701.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/zotobopig_zulezokum_muromesa.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/xefejevife/9502069271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96d81fa-2ba1-494c-a0d3-8cd634cde849/ps1_bios_scph1001.bin_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2578/7812/files/ferdydurke_ebook_chomikuj.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/vavuvuvukadaxipenupigad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8254/6845/files/vatomorisipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9770/0549/files/placa_me_asus_h110m-cs_br_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fdbe8e0-80ef-447f-9357-3a03739be512/minecraft_cracked_accounts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77754fda-f3a0-487e-baa6-b0d0d7aeac34/58179881608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7834/2598/files/observation_and_inference_worksheet_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6fd2a2-a365-4fdd-80cf-9fbe555248ac/70871915057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de60cf0c-5f8c-42e9-914b-35b26ca653ed/record_of_grancrest_war_episode_wiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6321/1701/files/arrb_unsealed_road_manual_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd9407a-58fb-44c7-9b62-27626bbc5358/p90x_nutrition_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000706c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706C 5200 bytes
SHA-256: aa17de37d617bc019e9cfe818d2e5de36730cedf225f04c0e45c6ea5bbeff26d
font_01_sfnt_off00008271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8271 4744 bytes
SHA-256: 2ac7af4166ae6bab77b8e03d4cb48dc49eeac0f7011024ac8f40f3c943eb470f
font_02_sfnt_off000092b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B8 10588 bytes
SHA-256: 00e54a1951fdf2d0effef8d69236593b1b3453ae80814cca95e0ba5fdfd5aa89

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