Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea30492c6b3cfe22…

MALICIOUS

PDF

95.7 KB Created: 2021-03-10 01:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 33fbdd7bbe45c60bd1dac8994238b157 SHA-1: 21c2045bd303ce176d31ba8365b3ba261a8f2b2a SHA-256: ea30492c6b3cfe2299570ca536f6a256c158e6e789db15377b4ea5580cb37dcd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. The primary URL, 'https://jottigo.ru/aws?utm_term=does+fitbit+charge+3+track+swimming+laps', suggests a deceptive lure related to search engine optimization. The presence of many external links, including one pointing to 's3.amazonaws.com/jifedefujodu/craftsman_edger_blade_removal.pdf', indicates a pattern of link manipulation for SEO purposes, which can be a precursor to distributing malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/aws?utm_term=does+fitbit+charge+3+track+swimming+laps PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414331/normal_6000a3983550b.pdfIn PDF document text
    • http://ooovseanalizi.ru/tazejokukilupiripumubi0506d.pdfIn PDF document text
    • http://pesale.pro/how_fast_do_navy_seals_runct94d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503987/normal_5fc5c9b48c9c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fdfd9927d670.pdfIn PDF document text
    • http://inertbhjbj.ru/service_intervals_suzuki_sv650a26x0.pdfIn PDF document text
    • http://mebelrostov.ru/ryzen_2700x_ram_guideoxtaz.pdfIn PDF document text
    • http://glasshookahcatering.com/kifefinigymdk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369516/normal_5fceccdec07b2.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/jifedefujodu/craftsman_edger_blade_removal.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_3237f36273ef4c59900ca26cda3cad25.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1762477-e087-4a63-9139-21fc18aefa0e/how_to_search_images_on_google_by_size.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/insect_pinning_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/camera_eyewear_v12_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/96129877506.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/2015_acura_mdx_car_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0566a063-cc5f-443d-a2af-56702b8703d4/what_is_the_average_lexile_level_for_a_seventh_grader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952dfe8a-eab4-400c-9a80-8e5f51c57bca/63985845709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67734a07-c8d7-4135-8c24-c177317f5340/how_to_use_digital_camera_as_webcam_for_skype.pdfIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_f098a442de854ccf97fd1dbf97179c93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remuv/3081161346.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/sydney_to_canberra_road_trip_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/21202820460.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/ionic_bonding_practice_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/73984456211.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_off000137ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FF 5888 bytes
SHA-256: b02975589c52e5184e1b7acff539eac22418ac34ce62ce270f1018e24aedfa18
font_01_sfnt_off00014c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C03 10836 bytes
SHA-256: 5313148d2a588b5a7f1328a50bbb01f263c9eebc77b1e66609890f25c2a20c74

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