Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68a893437927f80…

MALICIOUS

PDF

60.7 KB Created: 2020-12-05 17:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0beca607aa2bdf38b92c4f05c03c1ab1 SHA-1: 76ab37d22363061a885c9116672bd645e2aa980f SHA-256: d68a893437927f8069298f51275bcad6a280cc7593e8d20b23db31613e62042d
194 Risk Score

Malware Insights

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

The PDF contains a link impersonating Microsoft services, directing users to a malicious redirector URL. This is a common tactic for credential phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ggtraff.ru/123?utm_term=www.hotmail.comhttps+%252F%252Fwww.msn.com%252F+ocid%253Dmailsignout.
  • 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://ggtraff.ru/123?utm_term=www.hotmail.comhttps+%252F%252Fwww.msn.com%252F+ocid%253Dmailsignout In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0ad477-64d7-42aa-b170-63ada0c0342c/adecuacion_curricular_de_objetivos_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e561141-54f6-49a4-ae6a-f84c2308fd9f/37526464448.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/beginner_piano_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed012e537a05ef0936a0/t/5fc222961972c46e3ce6f145/1606558359566/zejanilo.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/97425634164.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/the_monkey_dance_hillsong_video.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/marsden_brewer_maine.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/pavipafaruvegojurapagu.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/9140045403.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/65522392350.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e607df132613bbbdbdb8/t/5fc12df2173fb5383bccdfb9/1606495730907/on_the_hill_lyrics_ed_sheeran.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/funny_answer_machine_messages_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/tozifakuguvexemutok.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/henderson_rec_center_basketball.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/non_abelian_group.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f904e19c-c236-4d6e-8bb8-d3bd4506bbdf/wenepisovofetiwanunexu.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_off0000b093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB093 5608 bytes
SHA-256: 2ca80135570fb839cc8592068cd6d00574d799bdc7ad96a34bef93da6e4795ca
font_01_sfnt_off0000c3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A7 10004 bytes
SHA-256: 083d9252860ad6b27861007222d5d3f5657a67e00b726ae4c54d5d08865a9028

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