Malicious PDF — malware analysis report

Static analysis result for SHA-256 9183c1f9b445456a…

MALICIOUS

PDF

90.5 KB Created: 2021-04-03 12:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b76190bab71128dd2eb2f622c265c495 SHA-1: 52f898fd12325e9ca3e4332c2b5de6ee88eb429a SHA-256: 9183c1f9b445456acee21359b2b1d326a3fe037d50c118e5d9885e26488ddcc4
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://mezovuduw.ru/wix?keyword=dotabuff+kotl+guide PDF link annotation
    • https://cdn.sqhk.co/vujejanar/UBDjhx5/literary_terms_crossword_puzzle_ms._pena_answers.pdfIn PDF document text
    • http://rent-nout.site/bsf_online_form_2018_gdjhpsu.pdfIn PDF document text
    • http://masajsalonunuz.com/cuanto_es_25_32_en_pulgadasrnyoz.pdfIn PDF document text
    • https://jedifugidu.weebly.com/uploads/1/3/1/3/131382595/tigige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_5fea2d3196741.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/b7f0a653a59b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_6055bb0874ecf.pdfIn PDF document text
    • http://operationhomeplate.com/strong_beautiful_daughter_quotesstaro.pdfIn PDF document text
    • http://summerita.fun/36886947318cfjh9.pdfIn PDF document text
    • https://toziraza.weebly.com/uploads/1/3/4/5/134506396/nomepepewipop.pdfIn PDF document text
    • https://peposinosodidel.weebly.com/uploads/1/3/4/3/134317522/5844282.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofoziga/FhazhaT/final_fantasy_tactics_advance_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_603c7cb699624.pdfIn PDF document text
    • http://pek-24.cc/ignou_blis_solved_assignment_free_2018-_19mn9ic.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/dgchdey/68972521117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_604cdeb47a05f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sazixipame/jojezegewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e15bba-163e-496d-872d-85913ecf17ea/what_are_the_three_words_that_describe_the_grinch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be549931-bf6b-4a86-ad0d-266cbaf7aae9/buwudiweka.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/dm_background_psd_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7137bc97-5050-4296-bab7-93f704d6cd4f/1086451460.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 16600 bytes
SHA-256: 9709949ca67e5c0adc7caf80e5d34adb8d204aa023913dab13ad8d0d311c250c
font_01_sfnt_off0001199a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199A 5004 bytes
SHA-256: fcaf7be8bb7f10d25e26e9db72958b48df891dba2d725a4ca1bcd2296907789c
font_02_sfnt_off00012ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC1 16300 bytes
SHA-256: 68f700971e231234b499d9c6d2c41e2c719ec77f09a276c14aad60175e7e0e73

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