Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c656095c8f11cd…

MALICIOUS

PDF

98.3 KB Created: 2021-03-31 19:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 42e36915ab9bceaa37569a6da0d11131 SHA-1: 129a56d7f2e30bbddea8c277f1b7815e6c409c27 SHA-256: d0c656095c8f11cda57f0abe650c8ea70ebfe5fc0bd3741a868d5fc3997c55ad
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 0.9994

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://druttle.ru/wix?keyword=jbl+charge+2+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425237/normal_602213d9d5b1a.pdfIn PDF document text
    • http://ecosbor.net/9260524377880ufq.pdfIn PDF document text
    • https://bukodagunotul.weebly.com/uploads/1/3/4/0/134012399/d4511da5e508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fd1902ac9770.pdfIn PDF document text
    • http://delibopujex.iblogger.org/42227773700.pdfIn PDF document text
    • https://gubuwogufulero.weebly.com/uploads/1/3/4/6/134608521/5654cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_5fe955c9bf37a.pdfIn PDF document text
    • http://indir-kazan.com/ged_math_practice_worksheets_printablewuqyw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_6040f654432af.pdfIn PDF document text
    • http://febemavakikago.iblogger.org/video_er_app_for_iphone_6.pdfIn PDF document text
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/goxilul.pdfIn PDF document text
    • http://zasosidimul.22web.org/anger_management_workbooks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_bb6f9f4d7d6c4b529a2343036a2ee333.pdf?index=trueIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_6f4e3dea7b5248f2b89057f953c35274.pdf?index=trueIn PDF document text
    • http://pelotisevinok.rf.gd/fisudifutekaregowuzewepug.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_556f062a9feb44999002643395bbcd48.pdf?index=trueIn PDF document text
    • http://zofikexegugimum.rf.gd/24455099929.pdfIn PDF document text
    • http://mogexusa.rf.gd/sopate.pdfIn PDF document text
    • http://ligabuzi.epizy.com/social_psychology_journal_articles.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 16836 bytes
SHA-256: b94f7226e8674636f106c4a21a3affc584af69777b6a1698947518e0d240f99d
font_01_sfnt_off000115ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EF 5652 bytes
SHA-256: 41b19e1a9180df3816dd1a1626f7163799ca31ff386003b0e24155b5b371e393
font_02_sfnt_off000128f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F2 2048 bytes
SHA-256: e6288a8b3c5ceab98dbfeb43f9498ec0cd1af6bc72dea1fb7e7969938b35b09f
font_03_sfnt_off000131d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D9 17392 bytes
SHA-256: 23253429d7f9ed234f17a4d5049808027ceb2be2dbc2be99367d222d150bc572
font_04_sfnt_off00016493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16493 16148 bytes
SHA-256: 43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7

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