Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d572259018d235…

MALICIOUS

PDF

81.9 KB Created: 2021-05-23 12:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 17b30bde5e3b343c5b5b9be14533ecce SHA-1: 23eb76ae232a848bfcf309805753b74b8042a5ba SHA-256: b6d572259018d235e075ea6dfb865e3526a93275dc666a2949307c6a6b9001f4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful content.

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
  • 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://resalured.ru/strik?utm_term=molde+para+hacer+un+prisma+pentagonal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471236/normal_6062515561292.pdfIn PDF document text
    • https://totakolexab.weebly.com/uploads/1/3/5/3/135391630/3637086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386828/normal_5feb6e838b500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471082/normal_60083ccce0f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_6018b19daec8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499351/normal_5ff6b4a200d69.pdfIn PDF document text
    • https://bemilinup.weebly.com/uploads/1/3/4/3/134390274/4579071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_5fd717a978ce1.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/xupevalerebasu_kiruxafimerok_pelexabosi.pdfIn PDF document text
    • https://lorerepurukese.weebly.com/uploads/1/3/1/4/131453396/b3be034514bb8f.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/jotizifime/69676633904.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/green_glass_door_riddles_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/bumez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d30d612-02d8-4ad3-a220-78aa6ac7e913/sample_food_comments.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/moment_format_time_12_hour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ffe6eb9-330e-458f-ba1e-b271b3724815/97590347745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679160fc-b2c7-48c2-b251-504d47d98b36/garedijovedejelamuxozus.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/oscar_winning_movies_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f8bb9b9-5fca-4113-89f6-ddf736ed258b/8306409323.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7C 3080 bytes
SHA-256: 5510861e0701cb7f7f57c1c4f6c9cfe19f8a483cefdede93edc0bf9cc0aea221
font_01_sfnt_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 5492 bytes
SHA-256: 11a4d28e6e25aea8113636a228a6c8ec3c775afaffb429f82938d371bafa4a37
font_02_sfnt_off0000fc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0C 12220 bytes
SHA-256: 1f0bf41532161a728eb08f159aea53d3f1b56d7a917263b66011c51ac87ec589
font_03_sfnt_off0001237b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237B 16060 bytes
SHA-256: 313c3940a6f4aae92ceaa1b1a843de6e6f13411355a457aba6e018c383fce54c

Open this report in the interactive analyzer, or submit your own file for analysis.