Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90e9cfa068d85b0…

MALICIOUS

PDF

40.3 KB Created: 2020-10-11 14:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 216597a351b0dc04440ed5d340195873 SHA-1: dda31bc0b6d2117599c7a56a5b3bb8593cb07bda SHA-256: f90e9cfa068d85b0c2c0d7d170e1ff89a203f8fa467bea62e19c42d6511005ce
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=somewhere+over+the+rainbow+ukulele+c In PDF document text
    • http://files.usafortunae.com/uploads/1/3/1/8/131856584/liwifejebiv-xojakaxebopanej-wijilimiw.pdfIn PDF document text
    • http://files.jessicamaryrobinson.com/uploads/1/3/1/4/131453395/juvopilenozalozaso.pdfIn PDF document text
    • http://mibifoba.crupropertymanagement.es/uploads/1/3/1/1/131164392/3351265.pdfIn PDF document text
    • http://files.roundlaketheatre.com/uploads/1/3/1/3/131380158/703301.pdfIn PDF document text
    • http://files.soulbrewcafe.com.au/uploads/1/3/0/7/130776775/f6b615255.pdfIn PDF document text
    • http://files.wholemindhealing.com/uploads/1/3/1/3/131380899/9819349.pdfIn PDF document text
    • https://site-1036748.mozfiles.com/files/1036748/fibazisitovazulopedigu.pdfIn PDF document text
    • https://site-1040879.mozfiles.com/files/1040879/tuwogulirakiluboxagejuvis.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/dineguguzatusatedeke.pdfIn PDF document text
    • https://site-1038753.mozfiles.com/files/1038753/wokisaneg.pdfIn PDF document text
    • https://site-1040399.mozfiles.com/files/1040399/18215439637.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/33312216049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5436 3256 bytes
SHA-256: 0ab74b627b193a5aca888566a106a8bf100a3b6ecd3844fa260b5aabf4f38a87
font_01_sfnt_off00005fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 5320 bytes
SHA-256: fa8ae8b6d1296e2a779f082576eddfa833ede771e1ff6f8388eaf87cc7ba6a73
font_02_sfnt_off000071cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CD 10028 bytes
SHA-256: 60175f1dcef644e38fa8d749cdce49089d08287db9a0730b48b62700f5516477