Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c8be050b2cace7…

MALICIOUS

PDF

52.3 KB Created: 2020-11-07 02:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 76abc8fb2c1fbe773584398d2017ca3e SHA-1: 32dbddaf0f997fb285ad1d9f02b1a1a639fd6645 SHA-256: 88c8be050b2cace7edd2d7802e3a4a05158137ec0e560c87802223e69c6a1a9e
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://traffking.ru/aws?keyword=child+support+letter+stating+you+give+money In PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/69473b8dc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f88d0f6556f4.pdfIn PDF document text
    • https://lasaveba.weebly.com/uploads/1/3/4/4/134488520/6b9bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f958f712b722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424682/normal_5fa5c7d6a6f37.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/dasaxumexejezuda.pdfIn PDF document text
    • https://toxejezewigi.weebly.com/uploads/1/3/4/5/134513259/lapipojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f92a93386acf.pdfIn PDF document text
    • https://xaranetudu.weebly.com/uploads/1/3/4/0/134016810/nituf-dumokuvetukadom-wabapige-pigawelogen.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://s3.amazonaws.com/gupuso/zixabaworewekilotilera.pdfIn PDF document text
    • https://silisejez.files.wordpress.com/2020/11/68446682015.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/que_es_la_adrenalina_y_cual_es_su_funcion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc68da08-2428-4883-bd95-42899989489f/topek_3.0_pastebin.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/madelizopididam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f873add-5cc8-44ad-b38c-3c429646350e/fokebitigimuxifopuxes.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/fast_lamborghini_remote_control_cars.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_off00007f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F76 5440 bytes
SHA-256: 588c9c8cbcacc5e358f29abcba8e2345aff53199357e8c6104766c483077e834
font_01_sfnt_off000091d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D4 10392 bytes
SHA-256: 4040f24da42b00cb67ebe8324dbec5aec8c3abf5e0fed116c7c70470026d8daa
font_02_sfnt_off0000b562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB562 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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