Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbd8dc954a35b37…

MALICIOUS

PDF

57.0 KB Created: 2020-10-02 13:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 47ff6a8444545b8aa2779727fbe4fcd8 SHA-1: a27997cee5863ae1fbafc2e565681ab09ab0913d SHA-256: fcbd8dc954a35b3794376093c94ff70402f0ce0beb71fe30935bf671f63a8de9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/strik?keyword=tutorial+wix+pdf In PDF document text
    • http://files.gaeunkim.com/uploads/1/3/1/4/131454986/pozori.pdfIn PDF document text
    • http://jugefawed.lenoratrussell.com/uploads/1/3/1/4/131414661/6579635.pdfIn PDF document text
    • http://vusijon.jane-george.com/uploads/1/3/1/4/131406258/a4ee20babd7dd9.pdfIn PDF document text
    • http://files.riverhustonart.com/uploads/1/3/1/4/131407370/tolegogexole-kifilejos.pdfIn PDF document text
    • http://files.aiping-taichi.com/uploads/1/3/2/7/132740594/garaf-xixaga.pdfIn PDF document text
    • https://site-1039274.mozfiles.com/files/1039274/53297672475.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/wipolanijutuwajudusoji.pdfIn PDF document text
    • https://site-1039893.mozfiles.com/files/1039893/vipafutawajuwo.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/lotatoz.pdfIn PDF document text
    • http://zoxem.threelittlepigsbath.com/uploads/1/3/2/8/132814439/filojotudokeleb_luvol_vulejefovuze.pdfIn PDF document text
    • http://takopab.annalisereinhardtphoto.com/uploads/1/3/2/3/132303052/nifikikirewunitezin.pdfIn PDF document text
    • http://files.chapinmarino.com/uploads/1/3/1/8/131856072/duzez.pdfIn PDF document text
    • http://files.studyyourwaynz.com/uploads/1/3/1/3/131383629/ratirel.pdfIn PDF document text
    • http://files.xn--grnder-4ya.guide/uploads/1/3/1/3/131398279/luxum_toxapo_desusegape.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://uploads.strikinglycdn.com/files/432561b3-c40b-4464-bb74-5ed97604a7d8/3202849687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ba6fcb-a0e3-425b-b6b1-aef641196475/51995106001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9f2a87-b8db-4238-ae19-4a3ac413dcff/kuxituxavagekowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ce049f-1388-46c7-9529-20294cd4ed24/45327349723.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_off000093bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93BD 4624 bytes
SHA-256: fb86937e76340ac4c36f3d230080d0478cd26ed2686d700241e19a4b888f2393
font_01_sfnt_off0000a398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA398 11028 bytes
SHA-256: 2a47686187dc053e9ece04e3ca9a5efe8ad1ce7127ecc48c9d563bb4e23edc26
font_02_sfnt_off0000c901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC901 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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