Malicious PDF — malware analysis report

Static analysis result for SHA-256 d695aed363073578…

MALICIOUS

PDF

83.7 KB Created: 2021-03-20 08:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 04579207cd418ca19a65107bc5853d62 SHA-1: b271e059406bd4a9a3b6929b3a03f588e3c3f6b2 SHA-256: d695aed363073578e5b8d653e771f724a80644fc7b48cc0f73433ec53bcba079
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'https://baarspo.ru/strik?utm_term=what+does+federal+limits+apply+on+illinois+drivers+license+mean'. This URL, combined with the heuristic 'PDF_SEO_LINK_FARM', suggests an attempt to manipulate search engine results or direct users to a malicious site. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://baarspo.ru/strik?utm_term=what+does+federal+limits+apply+on+illinois+drivers+license+mean PDF link annotation
    • http://megivisu.22web.org/97762716752.pdfIn PDF document text
    • http://vuvabadiredowa.getenjoyment.net/acopermnt_maicii_domnului_acatist.pdfIn PDF document text
    • http://rizovog.iblogger.org/warlock_build_guide_5e.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/ancient_greek_religion.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/pewibim/centrales_eolicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a496c204-a25b-41ce-9dab-8b2b100e0eb3/robertshaw_gas_valve_7000bmvr-lp.pdfIn PDF document text
    • https://a529afa0-707c-494d-9cee-e9df2360aa12.filesusr.com/ugd/a6e48a_6143a283fe8947b9b786bb6a8f4ca796.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/2002_club_car_golf_cart_seat_covers.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/mawetasexapipuxovoximeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dabc1e7-b972-42e9-a051-cb1ee6d751da/surfboard_sb6121_ip_address.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_f1933f9196cc47b1866a373aab5c62ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b904a147-665f-4c52-b59e-c0d737d2c3e9/cisco_to_juniper_bgp_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/ecology_lab.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/99154020304.pdfIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_1ce54fe4926145c28958e60c84aff6c5.pdf?index=trueIn PDF document text
    • http://mirepili.epizy.com/grid-_template-_columns_auto_auto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/919fec86-49c1-41f0-9e67-4a2b7baf17e0/14673500980.pdfIn PDF document text
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_b62af56d24f541c4a194adaae4265036.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ginutu/66118027239.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/gafizesoz.pdfIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_b8a92cbcad874c1394092bb4d09fa08c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sevoga/dateteragomufupofifeb.pdfIn PDF document text
    • http://nununad.myartsonline.com/burger_king_large_fries_nutrition_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b10d24c-5970-448b-81fc-e3583bff77eb/handy_stitch_handheld_sewing_machine_video.pdfIn PDF document text
    • http://pujumek.myartsonline.com/kingdons_three_streams.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/hernia_diafragmatica_en_adultos.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_off0001055d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055D 5572 bytes
SHA-256: 649463a008120ffebe8eaec79a55157a7b23a40e5cae23d899f2aac3e6c0dbd1
font_01_sfnt_off0001183e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183E 11632 bytes
SHA-256: 6f29a78826e692e989949aab0cea3cd2ad53b6d645cc1fc14825cb08b12be198

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