Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6853da28e8d03af…

MALICIOUS

PDF

82.9 KB Created: 2021-03-30 20:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d6e1aef70f30cbba4e83b69552df8173 SHA-1: 0fe41035d3d21b4d069e003638159defaf9b62eb SHA-256: b6853da28e8d03af59aa44396d7e1c6509189182a5c17d82716c8d4617fd9665
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely leading to a malicious website or further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=los+siete+espiritus+de+dios+pdf PDF link annotation
    • https://cdn.sqhk.co/dukoredod/ahdMieA/nujidepadazodawedaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_603b05ec2679c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412908/normal_5fcace2ab3a06.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/jiijdgj/21879666284.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/WhcQxlE/nerajururumakaz.pdfIn PDF document text
    • http://zoziwasikow.22web.org/88331542280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_605ff0e0d2e8b.pdfIn PDF document text
    • http://lipejilun.iblogger.org/animator_s_survival_kit_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_605b3995e706d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455174/normal_5ffabf5b12ad3.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/fmgiQij/dominoes_game_download_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5fe803bf78ac7.pdfIn PDF document text
    • https://cdn.sqhk.co/dokadajij/Ghbghxp/race_for_the_galaxy_expansions_rules.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_601bf9146eb27.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://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_b114a0be20e049929f6e172ac2dcd268.pdf?index=trueIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_1ee15c8dfba049cdb77a1cbf8f32e970.pdf?index=trueIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_a64037a3098843419090e5d58a71d98c.pdf?index=trueIn PDF document text
    • http://kanuzepiv.rf.gd/44972622676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2554d921-9e4e-4405-a7d6-0db887cd7709/kenmore_mini_ultra_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144879e4-a840-4330-91d2-71c83464173c/images_of_gandhi_with_charkha.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_f791a124d48f4763a9ae0e88170da82a.pdf?index=trueIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_5b573dcafd0b4ab38805b2f5d2653d1c.pdf?index=trueIn PDF document text
    • http://bukujinelekoxi.epizy.com/22989770689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0601b150-59fa-4c77-ba9c-31c05a44aca3/ozark_trail_6_person_flex_ridge_tent_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41f7ba3-2297-466a-9ac6-9d0b284b6fb8/food_dehydrator_jerky.pdfIn PDF document text
    • http://zekubegem.epizy.com/abstract_format_for_research_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7196f32-e337-44bf-996d-b05ada5cce1a/soundcraft_ui_software.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_off0000f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 4508 bytes
SHA-256: ece6e5a7e64461900bd442672a7278ac00b2eee5e6e4258c4d4323cdd781d5f3
font_01_sfnt_off00010726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10726 11952 bytes
SHA-256: 331be9fc4d0f4ad02b63d17386f65a46b1610634fd2b52ef7f8c3ef87a679900
font_02_sfnt_off00012e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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