Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdab25307c919664…

MALICIOUS

PDF

49.3 KB Created: 2020-10-08 23:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cb35b5b64479d03232307428cdb59be3 SHA-1: e37b2a3cad03e58c5e746d84e4412481b8dafc7e SHA-256: cdab25307c919664e3913ff9e867b283dec80b2ebfb9047e37773e2d2d7eb257
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://gettraff.ru/pify?keyword=polyatomic+ions+worksheet+pogil In PDF document text
    • http://tufiv.penwoodbrands.com/uploads/1/3/0/9/130969754/kedakewu.pdfIn PDF document text
    • http://files.sunvalleyballet.org/uploads/1/3/1/8/131857527/5038422.pdfIn PDF document text
    • http://noxabeb.ccmhcounseling.com/uploads/1/3/1/3/131379554/tibovug_filanewiwid.pdfIn PDF document text
    • http://files.mbacf.fr/uploads/1/3/2/6/132680896/6326751.pdfIn PDF document text
    • http://gofenudov.sppchurchwelland.com/uploads/1/3/1/8/131857112/vujugezum-polumapamivuv.pdfIn PDF document text
    • http://files.sensephysiotherapy.com/uploads/1/3/2/7/132740362/bosofiv_kekuzegisalof.pdfIn PDF document text
    • http://files.uglydiaries.com/uploads/1/3/1/1/131163920/8207169.pdfIn PDF document text
    • http://noxokidu.libertymensranch.com/uploads/1/3/1/8/131856646/sufeg_rularajoj.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/70976832934.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/pivuxupidenuwufewu.pdfIn PDF document text
    • https://site-1038798.mozfiles.com/files/1038798/xezuluxebupe.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://cdn.shopify.com/s/files/1/0438/4115/9333/files/algebra_2_chapter_12_test_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9C 5396 bytes
SHA-256: ba38691765f0ff645825ca80b83c48d479e3b97f45915cf012f7f5ea21dc92f4
font_01_sfnt_off000070d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D3 10288 bytes
SHA-256: 858714f0013606827ed3d67c6d45f16877c34ce8ecc20baf23d14fab640ce3f5
font_02_sfnt_off00009436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9436 16228 bytes
SHA-256: 197e58db151d700fd782018a230c3b2e6b16cf0e189d738a47ab2c754722e3ad
font_03_sfnt_off0000a996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA996 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34