Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c297811ecb3468…

MALICIOUS

PDF

83.0 KB Created: 2021-03-23 15:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d33b126b7d19e8a13ce0025fc3d9ce37 SHA-1: 93efdb42e45a9087aba1b86879fe5a138cf5b3f1 SHA-256: a6c297811ecb3468c525fcba05ccf555235bca250dd83c4de5d77b28ca6673c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://baarspo.ru/strik?utm_term=masterbuilt+propane+smoker+parts PDF link annotation
    • http://manamuposa.getenjoyment.net/supoxebevedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_601da51d49394.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/76955814729.pdfIn PDF document text
    • http://joxutikomujawi.iblogger.org/tujolalalaxakujatewuzofo.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/47580469752.pdfIn PDF document text
    • http://bisaxozitidif.22web.org/rixeje.pdfIn PDF document text
    • http://tokivaburag.22web.org/81518063832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_605464ef905b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5ff9acff026f7.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/85744557502.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_77254a2d98e4486fb035f9cc7bf616ff.pdf?index=trueIn PDF document text
    • https://a6053a4b-6066-498d-92a8-7748b68531bc.filesusr.com/ugd/5f0d2f_fbb538cf3fac48a8baea7a9b29c547f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/future_simple_exercises_worksheet.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_a676aa864eb3410daf3fe53ed22fd23f.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_733fb7ecc86b4577bbccd7607bc6c393.pdf?index=trueIn PDF document text
    • http://davinawoguzag.atwebpages.com/90027268221.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/75806502938.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/14089726778.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/capteur_de_pression_danfoss.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/badrinath_temple_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/31183431776.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3B 3128 bytes
SHA-256: 20b0bbcd330f62689bbb0eaa96d435268061f06b1b16ee96d33b36d28ab3124d
font_01_sfnt_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 5176 bytes
SHA-256: 33efa5d6d217b5fde2d7ad2346ac961d9a7a4021fbf405d26e0346ff17a802bf
font_02_sfnt_off00010c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C02 2352 bytes
SHA-256: 142b6c1f531d40d12c027b6f49b85d853b86d65546b6aa8ec322eae0b61cb934
font_03_sfnt_off000116ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AD 11472 bytes
SHA-256: c8b7cfab5ccb1325648ff97995e06a3fd1c08777aded448dd6e7bfdf942bb4b5

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