Malicious PDF — malware analysis report

Static analysis result for SHA-256 0134807454b3ab9f…

MALICIOUS

PDF

81.2 KB Created: 2021-04-12 22:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0279e0fd66df97bc61f789b1950602fc SHA-1: 0a37a11203651a68261b950b376a868b5b7a2baf SHA-256: 0134807454b3ab9f06366db4d4ae4f88333841837cc8d3dbe1a83416db0c18fc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary one disguised as a search query for nutritional information. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. ClamAV detection and ML classification confirm the malicious nature of the file, likely a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://midufefew.ru/strik?utm_term=how+many+carbs+are+in+a+krispy+kreme+original+glazed+donut PDF link annotation
    • http://xepewifub.mygamesonline.org/19716452633.pdfIn PDF document text
    • http://gazedalepi.sportsontheweb.net/balada_para_adelina_guitarra.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_603f662b472be.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/fevulenilatab.pdfIn PDF document text
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/xamizod-lufutasuvis.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/tanozewetatazirazin.pdfIn PDF document text
    • http://rijunoje.mygamesonline.org/hindu_festival_calendar_2020_download.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/59333583856.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/expert_card_technique.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5fcf87ddcb58e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5fd1733c90aa6.pdfIn PDF document text
    • https://fufifodex.weebly.com/uploads/1/3/2/8/132814348/2bf3053902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wozoxub/ruger_lcp_holster.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/josexaxagutifa.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/85899585528.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/platformio_lib_deps_git.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/83615362696.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/weakness_job_interview_example_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/does_target_have_jumper_cables.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/top_ugandan_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/debussy_suite_bergamasque_prelude_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/zumexudekidujafituzavup.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 5804 bytes
SHA-256: 2469ffe08a8d5e2dcdf38693a609e1733d72a4fdd684ef12fdcecebac6a31afa
font_01_sfnt_off00010f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F82 11436 bytes
SHA-256: 13761566dfb5ccfe724afd43f0dc86d28078cddfd5fa7127e27f60a72b160324

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