Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbda829fe0ccdde9…

MALICIOUS

PDF

46.2 KB Created: 2020-10-01 21:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e5bb62447b1d716b5aa7754c3c493c0a SHA-1: ffccbe072ac814241da591be3cab9b0706b0d8fe SHA-256: dbda829fe0ccdde98f2f72d191c3741cae4228a08d1e757f274d4a74db16e9dd
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://cctraff.ru/strik?keyword=s%25C3%25A1ch+methode+rose+pdf In PDF document text
    • http://files.wadyra.org/uploads/1/3/0/7/130775518/7039444.pdfIn PDF document text
    • http://files.thespeculativekitchen.com/uploads/1/3/1/3/131384656/jumesanuresakil_jedodalegakoxu.pdfIn PDF document text
    • http://bipesan.ascotpaddocks.co.uk/uploads/1/3/0/7/130775470/6185365.pdfIn PDF document text
    • http://poxaxus.mnelks.org/uploads/1/3/1/3/131384424/fukaguxivaj_fonit.pdfIn PDF document text
    • http://nujixan.leggolf.com/uploads/1/3/1/4/131412290/5b6e2da7df8399f.pdfIn PDF document text
    • http://files.coachhousecochins.com/uploads/1/3/0/7/130739525/fekukeranekudo.pdfIn PDF document text
    • http://tupoze.collegepark4u.org/uploads/1/3/1/0/131070340/80cfda110.pdfIn PDF document text
    • http://files.carlscite.com/uploads/1/3/2/6/132680831/kusim-diwuzejevetapog-tenerez-zefemumufatagaf.pdfIn PDF document text
    • http://files.ofbulldogfootball.com/uploads/1/3/1/6/131607131/2452838.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/07294620-1642-4597-9f13-510d2261a7bc/16548017598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1000cd-bad4-45a0-bb44-5030934f26d9/58537360214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6509dd29-bbb1-4fc0-880f-34e78f523aad/sidizagufavuwubanizip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9532115-c52e-417c-bfd5-da35f6115357/buropevoxilewotarolowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96274772-b9d2-48cd-82a0-f25478633f6a/90783992489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd23a627-8de2-44ff-9161-3e121ba3bd09/tajemawemokuvoniweguni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c7d744-747d-4456-95e0-57ec0f7375b7/60353335127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5608c9-1c42-43a4-9f19-1ba805aa85ab/memavewadatug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50a3fbc-6c17-41de-a952-cefe0d9030e9/84029666416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acba668b-0030-44c6-b056-6d6938f378c3/xasefov.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_off00006572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6572 5124 bytes
SHA-256: 7471e2c45bd597a39e46cc43c9fce6e22fbcfc183f02f9418fe0524c7c8795bf
font_01_sfnt_off000076cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CB 12140 bytes
SHA-256: 5b38c6b8022e73de58708a95f1f550c2d6a9bdfbee5a00df706142f593a49899
font_02_sfnt_off00009b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B78 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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