Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b59a47d3e10ab1…

MALICIOUS

PDF

81.8 KB Created: 2021-05-02 22:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d16f23315a148c92d9770d34f48601a SHA-1: 145414f48f56482dd70446bd22055fd4605e9ced SHA-256: 89b59a47d3e10ab144edfd7cb074be2aba713d2a4f9fb4b7720c59e7c1d1de84
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized pages designed to host further malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a network of linked pages. While no scripts were directly extracted, the presence of numerous unknown URLs suggests a phishing or redirection scheme, likely intended to deliver a second-stage payload or lead users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=best+42+inch+riding+lawn+mower+2020
    • http://jadebey-x.com/how_much_is_an_oil_change_for_a_volkswagen_tiguan4ezg5.pdf
    • http://belplitka.ru/chomsky_normal_form_solved_examples3agdh.pdf
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/a1d0ca22092f.pdf
    • http://rerubin.space/data_warehousing_specialist2ylrv.pdf
    • http://rastet-malysh.ru/what_are_the_types_of_operating_system_and_their_functions85zyx.pdf
    • http://center-about.com/87860436903wbb5d.pdf
    • http://cashbackmoney.info/tubedoguvupe14chr.pdf
    • https://putusura.weebly.com/uploads/1/3/1/6/131606782/4618394.pdf
    • http://ptmonline.ru/85168697058anc9n.pdf
    • https://dufebekeromodi.weebly.com/uploads/1/3/0/7/130776386/6618812.pdf
    • http://agreevudb.rest/9561940090744p7f.pdf
    • http://help-verification.com/short_motivational_stories_for_students_in_hindifc0xw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f2a360e8-f8b6-468c-b65b-6904ff088977/minn_kota_terrova_ipilot_link.pdf
    • https://uploads.strikinglycdn.com/files/7395ed73-12dc-464d-8ca8-66ca8c458b14/adobe_flash_cs3_free_download_full_version_with_crack_filehippo.pdf
    • https://uploads.strikinglycdn.com/files/cd5f949a-582a-4d73-a629-23ca724928ca/60616704007.pdf
    • https://uploads.strikinglycdn.com/files/63e7cebd-48a1-4b88-9296-c4b9c9833300/crear_un_archivo_zip_en_mac.pdf
    • https://s3.amazonaws.com/mupukesunobaga/41300023360.pdf
    • https://uploads.strikinglycdn.com/files/c1457ee3-7024-44ab-a905-f8463b47f590/3832770652.pdf
    • https://s3.amazonaws.com/dewazewokib/72517712893.pdf
    • https://uploads.strikinglycdn.com/files/4fb56d57-9660-4544-b0d8-e95ed3856949/56002240982.pdf
    • https://uploads.strikinglycdn.com/files/f2c202e9-e612-4746-b740-cf39cc2f31d1/are_big_nate_books_graphic_novels.pdf
    • https://uploads.strikinglycdn.com/files/155902bb-c3b5-43c6-b784-6a3ba0c3e897/hp_deskjet_2545_ink_cartridge_price.pdf
    • https://uploads.strikinglycdn.com/files/b490fe2e-5bbf-4d02-bf05-e26f9c789841/how_many_scoops_of_dunkin_donuts_coffee_for_12_cups.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42b.bin
616b7277b9f35acf18a54b01cb893383e995c42f37e2f4caa995cbcf288905c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF42B 5644 bytes
font_01_sfnt_off00010738.bin
5558f1fe8c603aac64c2995d462464cf42cf9a088ac1f8cf830fb7138b309e1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10738 10616 bytes
font_02_sfnt_off00012b78.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B78 4324 bytes

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