Malicious PDF — malware analysis report

Static analysis result for SHA-256 1226c00c0be3801b…

MALICIOUS

PDF

99.7 KB Created: 2021-05-12 18:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4436b2a4d2340a40060bfac9523891da SHA-1: 31a248b91ba2e32c6947e4ae821c42cdabf9842a SHA-256: 1226c00c0be3801be2fce19a76438cc840e6691baa5408bb53e2e248253b474a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary external URI points to 'https://pelibifir.ru/strik', suggesting a phishing or redirection attempt. ClamAV also detected the file as 'Pdf.Phishing.Trojan', reinforcing the malicious classification. The document body is heavily obfuscated, but the presence of external links and the heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/strik?utm_term=sports+illustrated+swimsuit+issue+transgender+model PDF link annotation
    • http://artyom.guru/bhagavad_gita_in_english_ebook_free_downloadrm4z0.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/7898ede927.pdfIn PDF document text
    • https://sufimademum.weebly.com/uploads/1/3/4/2/134236216/bc1d0ce69a933.pdfIn PDF document text
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/pexepupip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_603fa04391000.pdfIn PDF document text
    • http://top-shop-store.website/vidobulusopawewasovalekijhjkrl.pdfIn PDF document text
    • https://kusovagojevo.weebly.com/uploads/1/3/4/8/134883394/7478384.pdfIn PDF document text
    • http://ita-bio.fun/pomesabiwigotufebozumupcbhw.pdfIn PDF document text
    • http://wow50.pro/sheet_pan_steak_stir_frym1hi4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_60476de0d3ea3.pdfIn PDF document text
    • https://wusudomujud.weebly.com/uploads/1/3/7/5/137517937/2180766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414498/normal_60245d199a37f.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/juwofuxufijup/dive_bar_line_dance_step_sheet.pdfIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_42c5cc58c85146f5b99c5494b776cad8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/p_name_love_image.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_01af0e0776534121a3307cb266343d94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/welanisowari/play_store_application_android.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_955f9a418bf049bd9c1b9de4415b8528.pdf?index=trueIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_0368da5caeee497a9b7604659a768a3a.pdf?index=trueIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_0d1a9ae5bd744199b0f4d1555e38c24a.pdf?index=trueIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_fc0a3724c967467f85dc8c885c202c6b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/65636574760.pdfIn PDF document text
    • https://351e5f87-f9e5-4015-92cd-d601692b9ec3.filesusr.com/ugd/a0d0d3_0be88fdd17354cdbb70dd8c0503761ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/letter_d_worksheets.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_off000147cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CB 5472 bytes
SHA-256: e0f77d41b717409c73254ce82e2d20f6ad0a8536e1d6387e14b121a343f4f54d
font_01_sfnt_off00015a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5F 11400 bytes
SHA-256: 2772da0c116a4e0fa3d1ee9b835bddb319898dad044b8b8bb7643168e12af1dd

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