Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63225fa57ebeec4…

MALICIOUS

PDF

68.3 KB Created: 2021-02-27 00:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7e10903f0580afcc3d760f24db2eeb99 SHA-1: 2a60af3c5f1510067d1c0d7dd7b68221f3716ab9 SHA-256: f63225fa57ebeec4a2fa9854e083a388f0e5c83c0751476b7aca6de88d521942
156 Risk Score

Malware Insights

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

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 0.9998

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://dafemum.ru/aws?utm_term=witcher+books+full+set PDF link annotation
    • https://muxuxinipizo.weebly.com/uploads/1/3/1/6/131637853/be9264fe4c01.pdfIn PDF document text
    • http://kopavavabigi.66ghz.com/68804298721.pdfIn PDF document text
    • https://motawifuliwax.weebly.com/uploads/1/3/3/9/133999363/9341335.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/ggqgcAM/business_leadership_strategic_thinking.pdfIn PDF document text
    • http://dofuluxaruze.22web.org/gobowobir.pdfIn PDF document text
    • https://nixunirebexif.weebly.com/uploads/1/3/0/7/130776125/8860847.pdfIn PDF document text
    • http://wofijolusiga.iblogger.org/pubiki.pdfIn PDF document text
    • https://zepigebilotexo.weebly.com/uploads/1/3/0/7/130739401/d9bd508f42a995.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/tazibabebamep/wrterbuch_deutsch_kroatisch_kostenlos.pdfIn PDF document text
    • http://sosibozipez.rf.gd/juxunoxejizapogezexesi.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/aetna_better_health_of_kansas_reconsideration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/cuisinart_ice-30bc_pure_indulgence_2qt.pdfIn PDF document text
    • http://duximepameme.epizy.com/kanawha_county_school_board_election_results_2020.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/hipertensi_menyebabkan_aterosklerosis.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/accelerated_math_probability_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/escape_plan_movie_hdpopcorns.pdfIn PDF document text
    • http://dikewovob.epizy.com/weather_report_ho_chi_minh_city.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_off0000cdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBC 4976 bytes
SHA-256: ad29e080a290ce1f4240f2f4039f4e7353ee1effeba9c5fd4baeade5889be58e
font_01_sfnt_off0000debb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBB 11032 bytes
SHA-256: 84d4f78a220aadc9c7c14288a9d9e290608dbd241c902d77869197686fecaea1

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