Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca02f51fc51bf24c…

MALICIOUS

PDF

140.2 KB Created: 2021-03-29 22:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 14b697d8d9193feeebed17d8ed840e06 SHA-1: 8f8658326cee1cc84f320dce8e144aace7de8494 SHA-256: ca02f51fc51bf24cbcd8b2b32039f7a471460c06896bf4226a9f902da34d626f
66 Risk Score

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 0.9956

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/award?keyword=lok+sabha+election+2020+date+in+west+bengal+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5ffa77f957165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503617/normal_60510ccf3f0b8.pdfIn PDF document text
    • https://ferijadupegol.weebly.com/uploads/1/3/4/7/134705138/jesijebemekelaj.pdfIn PDF document text
    • https://xuremesedadewo.weebly.com/uploads/1/3/4/5/134500919/panadigasezenewulo.pdfIn PDF document text
    • http://philonio.online/jibekvaizd.pdfIn PDF document text
    • http://rozel.ru/remajitetm2omt.pdfIn PDF document text
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/dbbfd491fa781f.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/the_book_download.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/pathophysiology_of_disease_8th_edition.pdfIn PDF document text
    • https://tipuzivi.weebly.com/uploads/1/3/0/9/130969377/073092a75df3.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/smart_wristband_2_manual_espaolzz69q.pdfIn PDF document text
    • http://pearhaidhr.fun/jakedunugufurcu2tt.pdfIn PDF document text
    • http://guitar.su/panevubulozbha.pdfIn PDF document text
    • http://vevebopawo.mywebcommunity.org/definicion_de_energias_renovables.pdfIn PDF document text
    • https://gufakapefevem.weebly.com/uploads/1/3/5/9/135994046/sutavenafajevavokow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c22a73-71db-4af2-a706-5b6c99decd39/harry_potter_book_6_hardcover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58eedfc-88a4-4168-9f40-b9b096bf2972/how_to_make_distilled_water_for_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/52761548995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb6a554-e26a-440e-b982-8abfef1bd45e/how_to_say_oh_yeah_in_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efba14c-30ea-40d2-8ff8-9f701b53fb9e/zogafatutomebifosazokokav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aafd4524-6469-44a2-a0f3-bc604ae084eb/samsung_vrt_washer_error_code_ur.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/bimazigenex.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/20282270524.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DFD 5832 bytes
SHA-256: f4b4dadb52ba2db4defc6683c51b560d8390432f2afc1f404f5db0a1a64ef2ef
font_01_sfnt_off0001b1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1F2 14028 bytes
SHA-256: b25999924819da32b13e749f61c9232df69a6deb23fc1d3489783d2c388f0ceb
font_02_sfnt_off0001dd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD70 11728 bytes
SHA-256: 7a8e8feb65cfb699bb0564e9bc4a0c73744a132094cdea7e3a59870892a58a8e
font_03_sfnt_off000205a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205A6 8552 bytes
SHA-256: 9df483284c112cb4288f59e4e2c74fa031c371e3fb0a994ccbfc2de3e21f5208