Malicious PDF — malware analysis report

Static analysis result for SHA-256 351034333312c759…

MALICIOUS

PDF

77.9 KB Created: 2021-03-04 00:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2c3c5b76c730841f8429b3e96c1f3d44 SHA-1: aecf7e6d8f794bf498f2b536c8ea4513b744d521 SHA-256: 351034333312c7593c5bb1ca465714af190ad7fcc159b1dca72f8c0b060bd59e
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The presence of a large number of external links, specifically a 'PDF link farm', suggests an attempt to direct users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or content-farming attack vector, likely leveraging embedded JavaScript for execution.

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://gimoguvi.ru/strik?utm_term=the+endless+game+1989+movie+review PDF link annotation
    • https://dazutexigamufo.weebly.com/uploads/1/3/2/7/132740900/zafilipo.pdfIn PDF document text
    • http://rafonuza.22web.org/bachelorette_invitations_templates.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/xexodafedeni.pdfIn PDF document text
    • https://xesejiru.weebly.com/uploads/1/3/4/7/134716288/fejasosumenamemi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mokodipixa.epizy.com/cibc_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/bladee_who_goes_there.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/bonjour_regular_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/45877628785.pdfIn PDF document text
    • http://mesobuze.epizy.com/acoustic_guitar_music_pack_1.pdfIn PDF document text
    • http://pixudavevenute.rf.gd/63656564807.pdfIn PDF document text
    • http://buposewalesuz.rf.gd/basic_instinct_2_tamil_dubbed_movie.pdfIn PDF document text
    • http://gijuvaginitawaz.epizy.com/bullet_modified_image.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/advertising_campaign_timeline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/12149690705.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/gb_whatsapp_for_android_2019.pdfIn PDF document text
    • http://risitikavaj.rf.gd/methyl_ethyl_ketoxime_technical_data_sheet.pdfIn PDF document text
    • http://rigitusavogu.epizy.com/bungsaufgaben_binomische_formeln_mit_lsungen.pdfIn PDF document text
    • http://wilazetifoka.epizy.com/goxogivezile.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/jowabefufewawagorizigaxel.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_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 5740 bytes
SHA-256: 22d1ff157b0c46c019cf59273988afe58d4454f96bbae92dded27e0d1d8e982e
font_01_sfnt_off000105f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F5 10980 bytes
SHA-256: 5db3ace64b78f6635e53e363895999ba5b0efcd6bb10c490e941a157f818c6df

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