Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc406ad945f1fb64…

MALICIOUS

PDF

86.9 KB Created: 2021-03-12 10:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3fbf3ed620d58267d445d2f9a531fb97 SHA-1: 17d895e1c0c761323e7b6eba44ddedc8c2926641 SHA-256: cc406ad945f1fb644fc554bef9b5fd15fdaf1b12fc1b4cd954a6e463182a678d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9989

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://jacksth.ru/wix?keyword=forces-box+on+an+inclined+plane PDF link annotation
    • http://gepanukotex.getenjoyment.net/29618604284.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/definition_of_qualitative_data_analysis.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/wezuligutewepozerusagal.pdfIn PDF document text
    • http://vugaganopofom.mypressonline.com/84047787615.pdfIn PDF document text
    • http://kimisorunutom.medianewsonline.com/netetonavipotogef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://komoxam.rf.gd/microsoft_word_recipe_cookbook_template.pdfIn PDF document text
    • http://dobejevilorizu.epizy.com/vidapufa.pdfIn PDF document text
    • http://nuwojore.epizy.com/69218692950.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/46533623233.pdfIn PDF document text
    • http://pazatirademe.rf.gd/costco_holiday_shopping_guide.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_d5ee94b9da74405e847dbe20fda3042e.pdf?index=trueIn PDF document text
    • http://bamasivira.rf.gd/4230074181.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_226c0f92cfb04b1dab7bd3851101e009.pdf?index=trueIn PDF document text
    • http://kopixagelaje.rf.gd/zefediziwodobo.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/sererazogixagulor.pdfIn PDF document text
    • http://dopovis.myartsonline.com/wesapudofoban.pdfIn PDF document text
    • http://kazewuwebam.rf.gd/c_primer_plus_6th_edition_developers_library.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_1286d45c9fd546898ef953b369166df4.pdf?index=trueIn PDF document text
    • http://dapizodipe.myartsonline.com/9715154565.pdfIn PDF document text
    • http://fuluputig.epizy.com/suturumak.pdfIn PDF document text
    • http://lalemifeluruka.epizy.com/58633824182.pdfIn PDF document text
    • http://kakoxoduruze.epizy.com/42543566728.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_8598d430d2664e4393f9ac97c506a0f5.pdf?index=trueIn PDF document text
    • http://rakorasalonolit.rf.gd/the_enjoyment_of_music_13th_edition_answers.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/beckman_oral_motor_stretches.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FC 5264 bytes
SHA-256: b038e110ca5c2b3a221288602773ef3d14b19b6b44cd37098fbd01eb6e1aa365
font_01_sfnt_off000113f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F0 10724 bytes
SHA-256: b5cf00ce70648a39f3a0745eba7a0c4d1623af924b8e5a04a328cb99e53d0f69
font_02_sfnt_off000138b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B3 16192 bytes
SHA-256: 7854c2ce4cad06c708b32d495322eceb4eaf68dfec9569717ae77f68af2bf147

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