Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94dcc549a0badcf…

MALICIOUS

PDF

76.8 KB Created: 2021-03-11 11:23:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6485d190b468f3b63acaf105f337987f SHA-1: 5f6361fe55d3e265aaed30511f5a3a782e0d2279 SHA-256: b94dcc549a0badcf0b76e72a636e2a1e234a5d386f1be5e1a4d7deca0ffc37fb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain associated with phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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://jottigo.ru/strik?utm_term=aprender+ingles+basico+sozinho PDF link annotation
    • http://appeal-ig.com/49159024723az0ky.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5ffc66ebcf9ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414849/normal_5ff5613082520.pdfIn PDF document text
    • http://polikarmonolit.ru/factoring_linear_expressions_worksheet_7th_gradekc1cb.pdfIn PDF document text
    • http://m-ryanaf.site/90196520075sd06u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13a2bf7a-7930-4518-a7e6-737bf3c0aa4f.filesusr.com/ugd/f5c1a0_7755e9a555d3488394c795b18d27b7af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/code_of_canon_law_1917_english.pdfIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_167d413194324e7aa872cd75675fbab1.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_991d6d54e3964f389656a757139ad881.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/screen_video_recorder_app_for_android.pdfIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_15fe6952a2984e1fb390432a3fcef750.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_0e36b71fe6d843b3bd00469a3e4ec7e2.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_217b7b0fc19c475b8e9a9d3b4ab8aac0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/kodunijanidilozegalotemet.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/yann_tiersen_comptine_dun_autre_t_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/scipad_book_2_answers_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/mathworksheets4kids_quotient_rule_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/55012336778.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/pokemon_y_rom_ita_citra_android.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_off0000eba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA9 5512 bytes
SHA-256: b8826ca76172937a93faeb6fef114ff61bcea84447dc2ef3f0be540475fcf3db
font_01_sfnt_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 12484 bytes
SHA-256: ccc1e6a04ff784abef4efe3e097bcb9f8ecaaeb800c0ddc2564ed43c6aa472ba

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