Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e78ae8172dd1fa…

MALICIOUS

PDF

82.5 KB Created: 2021-03-09 02:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0a2a8e81c059472b44d4c513c06ae5d0 SHA-1: 8fd6e70629d2443bef477992c1baad8aa147088a SHA-256: d3e78ae8172dd1fa1d87f4ea2107e1c9b35290e36732681713d3ade14b54c9f5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, with a specific focus on SEO manipulation or phishing lures. The presence of embedded URLs and the PDF structure suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ponafet.ru/strik?utm_term=where+did+aboriginal+art+start+from PDF link annotation
    • http://bigonetudukori.iblogger.org/namesaf.pdfIn PDF document text
    • https://satataro.weebly.com/uploads/1/3/5/3/135350270/8637034.pdfIn PDF document text
    • https://gulurevipad.weebly.com/uploads/1/3/5/3/135349864/pubuj_dedirefigujomu.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/puvujenu.pdfIn PDF document text
    • https://vagerama.weebly.com/uploads/1/3/4/7/134767853/dobilopolafeveretux.pdfIn PDF document text
    • http://dirtygirl.fun/rdk-10000_error_codelm0l0.pdfIn PDF document text
    • https://zowemuxojawoput.weebly.com/uploads/1/3/4/3/134357794/besaketumejalowajaw.pdfIn PDF document text
    • http://netewe5.xyz/attack_on_titan_season_4_episode_6_funimationlsljw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_18b66631cd2343e2a679547a542a60a7.pdf?index=trueIn PDF document text
    • http://malinaliwul.epizy.com/film_baahubali_2_sub_indo_360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b10346-5494-4ae7-8803-53caed5031e9/what_happened_to_goodbye_book_free_online.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_4d03be899a4242bf9aae56cd677f57e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fd4c6a-a59b-4ec0-beff-c91afb0ddae5/junie_b_jones_list_of_books_in_order.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_5ebd2a37fdd7409ba4d604c9e9647595.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a638ab7-224d-4ba1-81a5-20de26c5cf24/what_do_you_need_to_get_your_drivers_license_renewed_in_arkansas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d647e875-d2b4-403a-8374-93973f9206b6/ligupinusemifirawen.pdfIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_aebd47d24e84473b8a2fc41e9d4972bc.pdf?index=trueIn PDF document text
    • http://buvelijixuzumu.epizy.com/82270544055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d63412-cf41-4d1d-9354-7d0162e99992/harley_davidson_service_cost_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bb9d15-c70b-4cb7-bd43-ca1b833a05e1/percy_jackson_greek_gods_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bacca0-8e8b-4827-8c04-360cbbe8a15b/vebixivosezoruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db3bf5e-e5ad-4980-8ed0-16bf59bb89ce/55705185533.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_off000104ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 5476 bytes
SHA-256: 23df273216445dc0b80728accaf72c9d181bb9d0f54713b7bc2b8aa76155af8f
font_01_sfnt_off0001173a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173A 10924 bytes
SHA-256: 0d10fee38984973601e001ec92d3dd92652667e0af6b0cec8f9797b24aacaa94