Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bb6d424ac2ea33…

MALICIOUS

PDF

78.2 KB Created: 2021-03-31 02:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f44c16629ad9beffac2e5de8529f679 SHA-1: 5c67f92d8f32cff7ebc94387a42985080811f354 SHA-256: 95bb6d424ac2ea33397560c16d76000a28d0b69497818fccae48d96389b1c197
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 0.9998

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://lozipotod.ru/123?utm_term=equations+with+fractions+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/tamejenonisi/jieiblN/animal_crossing_switch_console_target.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/tuwog.pdfIn PDF document text
    • https://cdn.sqhk.co/zepigelona/jeM8hfW/the_wolf_among_us_2_cancelled.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/LhjItlU/sewibol.pdfIn PDF document text
    • https://sotasoniwolog.weebly.com/uploads/1/3/1/6/131637806/tigamatisug-puwetisaxer-gozedanogugat.pdfIn PDF document text
    • https://baxawomegofagu.weebly.com/uploads/1/3/2/8/132815114/fafoduxaravejup_gipufaxufuti.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/gdk9gfp/vatican_guided_tour_length.pdfIn PDF document text
    • http://rejonanujezeke.22web.org/wodagitojogijeligupe.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/c2d511c02fdf.pdfIn PDF document text
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/mejuzen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_0c51bb286722495b830946ccf8960476.pdf?index=trueIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_da5adc5096da4539b6b4f5e5e0e54e48.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_f67cf3a265154de5a741b4398be34ca8.pdf?index=trueIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_93dec3a85b0245dba62770c0e4728f9f.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_a4fd5525555846cabe51165f451446c0.pdf?index=trueIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_ad28f0f27ca84f50b6a102ed0fd035e0.pdf?index=trueIn PDF document text
    • http://vimitafukufes.rf.gd/mama_just_killed_a_man_piano_sheet.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_b12b912924e7401a8d9b978fc916ed89.pdf?index=trueIn PDF document text
    • http://xafofeb.epizy.com/long_john_silvers_menu_with_prices.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 5060 bytes
SHA-256: 0cc237c90a93d2b55a9aaaebafaa377d798df239c7c4c8aa3433d5debe0c5872
font_01_sfnt_off0000f9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D1 10372 bytes
SHA-256: 2a8e217b501b81f356dd185d30d68ee39570a12469f53d77e8afee0c87ec98fd
font_02_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2