Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7bfc5e4b1be9bf…

MALICIOUS

PDF

37.5 KB Created: 2020-10-25 10:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-20
MD5: b456368b7bf0ab77068a4276c2f62bd6 SHA-1: 9f6772a51d0cca17d5d6b1ab9919bdead0f22003 SHA-256: 1c7bfc5e4b1be9bf501fb2b0a7004d2ff7acb4daeb4ec6696ecf85e172661c12
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://ttraff.me/123?keyword=weatherwise+weather+station+manual In PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/gizede.pdfIn PDF document text
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/fepik_bebokirunilaja_tedaba_gipel.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/52afa65.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/365214.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/510243.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/4255750.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/175971.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/99752f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f9459df20ee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f8873a76f2a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f8d6a7fd60f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f952d4c319a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9375f6ee-5ffb-4947-9ab9-1ba461b2c3f9/wolom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5119f031-5d2c-4ddc-b6d0-53d89e771984/little_office_of_the_blessed_virgin_mary_ewtn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eefc9a4-aede-4de9-9b17-a8dc12e4255f/vafedewetosopopezagirow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d08e783-3f63-4480-890a-459274c9ada3/5405644913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702bd8fb-88c6-48ac-93d7-2979afa192eb/77433302830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359c759d-3c05-43ec-ad44-1a1dde6a8461/69351808436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3800bd-f7d5-473c-a588-e458d01cd112/20151752755.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/64619714741.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/66442027017.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/76034470120.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D7 5028 bytes
SHA-256: e9bd402662b3de899812af097abb263491c083b62c33f88957ea6ba8922d8f4a
font_01_sfnt_off000065db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DB 10168 bytes
SHA-256: 8b017ef83a6a95875c8baab73d2e1e1264389935d5318f5fe25a77e15d219e1d

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