Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88e861117c3337a…

MALICIOUS

PDF

49.8 KB Created: 2020-10-04 22:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: afc129d4291a9fd31783f7f3159d0c94 SHA-1: 5b96744f9dc14dd4efbfe7b9b37bd18d9c7d4118 SHA-256: f88e861117c3337ae5faec35b32a390e41d8fc801925bec2dcf4ac4afa30718c
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=classification+of+matter+lab+answer+key In PDF document text
    • http://files.visitandrewchapelumc.org/uploads/1/3/1/8/131871980/lurazaf.pdfIn PDF document text
    • http://xawekar.smartgriddesign.com/uploads/1/3/0/7/130738792/575125.pdfIn PDF document text
    • http://wulesir.realestatebaguio.com/uploads/1/3/0/9/130969476/3845429.pdfIn PDF document text
    • http://files.abundantmentalhealth.com/uploads/1/3/1/3/131379223/farewap.pdfIn PDF document text
    • http://nesof.laurendfraser.com/uploads/1/3/1/6/131606186/muzefur_sikepijumu.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/jamuluwosopobipatale.pdfIn PDF document text
    • https://site-1038851.mozfiles.com/files/1038851/mavixedodelizusorugapoga.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/sujibarame.pdfIn PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/vuvonomivedaz.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://cdn.shopify.com/s/files/1/0440/6876/5848/files/tevexexituvufojakodebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4480/2207/files/61265916623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4321/1432/files/44084924764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e0d5e4f-14b2-4c2a-a4bb-7b7f59423ed4/14931333073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b13aa0cd-5923-417c-9bca-42e603855c01/52521960203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe3f3b52-7043-4e0f-a5f7-052873cd41a6/75414002549.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_off00007731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7731 5236 bytes
SHA-256: 129efbc76275f0f37dc248bee9b8c57cbb901cac58acb477301200edca7bd597
font_01_sfnt_off000088fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FA 10220 bytes
SHA-256: 0b25c23e6ccf40d0d9525e0fca45115dddf007c84cef8cbad8d9537291514503
font_02_sfnt_off0000abd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABD9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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