Malicious PDF — malware analysis report

Static analysis result for SHA-256 129424d6af2bae46…

MALICIOUS

PDF

70.0 KB Created: 2021-03-29 13:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1ecea4112f3bfa91d3b2da3f679d1fb4 SHA-1: 670a6af537e5fb6104db3e1305a9984b3774de76 SHA-256: 129424d6af2bae4678cc872066998f348b6656ced6e81fd29e657de63f2c9aa2
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9996

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://mezovuduw.ru/wix?keyword=wherever+you+may+go+lyrics+whitesnake PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5fe4bf75b19b2.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/basic_agriculture_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_604f88503acd8.pdfIn PDF document text
    • https://malufatagu.weebly.com/uploads/1/3/0/8/130874424/6501998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_601e6608298ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403672/normal_5ff65a315d78a.pdfIn PDF document text
    • https://tonilawug.weebly.com/uploads/1/3/4/6/134652309/730e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_602b3cd56dd7b.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/dirubowatigowe_bidodopupuxuja_ladaxakifitew.pdfIn PDF document text
    • https://doxizuzipoleri.weebly.com/uploads/1/3/5/3/135323895/6ee61d0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d024a73-b61e-4431-8f22-584f96728a30/how_do_i_change_a_hardwired_smoke_detector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c36f81-ca49-48a6-99f6-8e72ffb2b205/rca_universal_remote_tv_codes_element.pdfIn PDF document text
    • https://d8aee3b0-83ea-4a0d-b8f9-524a85b41d10.filesusr.com/ugd/105b34_3bf0542beb6d4c1d9ca7f92625ef967e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1b0e99-09f8-446c-8e31-39c0c753380e/world_map_printable_color.pdfIn PDF document text
    • http://ligiwekuxote.myartsonline.com/vitamin_b12_indonesia.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_87fcb265bf2f4496a50f1e705d8c9b51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd71a19-cc9f-41e8-9761-bf3f7cc152bb/identifying_figurative_language_worksheet_2_answers.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_384aa9c6a4674268813808ea7e20a34f.pdf?index=trueIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_e9dcdf47cbf24419b848411391300509.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_e7c63511ae24415e92007fed13d3f6c3.pdf?index=trueIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_b5e22c5f613a4410b000b7eca63ffd0e.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_7488b1ca17c043dca84dac41d2d73546.pdf?index=trueIn 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_off0000d326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD326 5544 bytes
SHA-256: 6d9d0b6362e2164c05bab95e5eea5ea67b89d841492ae2f9d3cd0dab4d522869
font_01_sfnt_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 11264 bytes
SHA-256: 60bb0a2aacba72ba190d78868068e8ae75f7547b0db492c8f5e194b542de02d8