Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bb3099818eec39…

MALICIOUS

PDF

55.0 KB Created: 2020-10-10 15:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 73142db3e5c99a93731256b77623a855 SHA-1: bc217bf02a5f8b8b67bb7f19eb1af43f592026f7 SHA-256: 69bb3099818eec399de0ff1c1842d8fbbc647fe61cfc233d2e00d94da901dab1
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=como+descubrio+os+microorganismos In PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/kiparozawojolobelu.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/14688931388.pdfIn PDF document text
    • https://site-1044473.mozfiles.com/files/1044473/37700725541.pdfIn PDF document text
    • https://site-1039355.mozfiles.com/files/1039355/doson.pdfIn PDF document text
    • https://site-1043534.mozfiles.com/files/1043534/47203015640.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/55765322618.pdfIn PDF document text
    • https://site-1043842.mozfiles.com/files/1043842/67069458599.pdfIn PDF document text
    • https://site-1037227.mozfiles.com/files/1037227/sawur.pdfIn PDF document text
    • http://files.whitelionbeauty.com/uploads/1/3/0/8/130814208/fulumipid-nigevopilak-vumibe.pdfIn PDF document text
    • http://files.andcaleb.com/uploads/1/3/1/3/131378852/dd752610f2.pdfIn PDF document text
    • http://jivanuk.thunderroadrunning.com/uploads/1/3/2/6/132683169/20119c77.pdfIn PDF document text
    • http://ruwibal.davidhaltonart.com/uploads/1/3/0/8/130814347/e96a91a3af28.pdfIn PDF document text
    • https://site-1038798.mozfiles.com/files/1038798/1505062653.pdfIn PDF document text
    • https://site-1040354.mozfiles.com/files/1040354/fazamubigakebelob.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/57908589362.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/bekilomepepidepuvefabupe.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
    • 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_off00008905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8905 5192 bytes
SHA-256: cf5b870ba683417cbf96d939871e539c6a6309c9b67668de4ce44d4fe907704a
font_01_sfnt_off00009a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A81 11032 bytes
SHA-256: 8ef9f16d7b3e2a143876e78a5776bd89e6cc477141669b02b9f0acc264ee7e57
font_02_sfnt_off0000bea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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