Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0300bb35af0b3c…

MALICIOUS

PDF

78.2 KB Created: 2020-12-06 01:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2f36c37c5b03dd64bab3ea6c953282ed SHA-1: 3086b835bb6646f3acd15e6c8c09caffbd90b4ce SHA-256: 5e0300bb35af0b3cc9b411b7e2efa405dbd134a812c4085107d7eba18613debf
164 Risk Score

Malware Insights

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

The PDF document contains a lure related to exam results and embeds a large number of external links, many of which point to potentially malicious content or SEO spam. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/123?utm_term=bangladesh+bar+council+enrollment+exam+result+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5f9bdca4e5456.pdfIn PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/rabelev.pdfIn 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/aec96337-078a-4e22-9459-41a2efd68204/cat_mario_hacked_arcadeprehacks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53a1dbe-b939-4fdb-bedc-f7bb7f6504bf/fafowunakavawisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ee6bff-d61e-44a7-984f-2d7b72af7382/xidebikomilijofaninudi.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/printable_rental_agreements.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/second_law_of_thermodynamics_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cfd7f86-8f19-412e-bcb8-30582279bad8/aspects_in_astrology_sue_tompkins_pd.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/muguzexitilolikofadu.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/kekexezanukedoporele.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/43850582324.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/ap_physics_1_free_response_2012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10e3593-f88f-4b4d-a474-2217aef7c637/terezeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654e0a1c-f953-4b57-b7c1-854591b8c7ab/dilekop.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D1 5884 bytes
SHA-256: 64f6544c431d833ac6337ca36362ceadb9bbd8f6b6668e4414d75c2949cc936a
font_01_sfnt_off0000e5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A9 10116 bytes
SHA-256: c91265f19b52d4af270fed742338eb960a0ea9b09dab8368ee9c1e357de74819
font_02_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 11120 bytes
SHA-256: 4509cc3f3c964c148922e21a318d34bf1be9da796b1939d4f8a5a1361a7ae059

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