Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfbdd2f11afebb8…

MALICIOUS

PDF

75.7 KB Created: 2021-04-01 20:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0078cf7e49aa0fc72883097b828d5efc SHA-1: c783b5ac489dd74aa0352b843b2ee25cf5530a98 SHA-256: 2cfbdd2f11afebb807e4e23bc1b2d090d035e1e2f7ee52ac9370cd35aa296883
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content hosted on external sites. ClamAV also detected this as a phishing trojan.

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 http://www.ascendercorp.com/ In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/_7yJ53orglQ/wb?keyword=understanding%20movies%2014th%20editionPDF link annotation
    • https://f538c46d-6aff-4997-95da-320e40b30403.filesusr.com/ugd/262ba4_58aee8f021cc4f76b81d04c345237d6c.pdf?index=trueIn PDF document text
    • https://02aee961-309f-4c8b-9790-08f12c26706e.filesusr.com/ugd/8321db_78cce7177f424349b6b491c92d793644.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_3f55def9d56b410c937737cafa04962e.pdf?index=trueIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_0cba9c2764dd47a29768bd49d0a2ab27.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/29951d6e-ce8f-445a-9f57-2399c8a1165e/vadonevowipupajuxoderu.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/aplikasi_adobe_audition_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a6a709-9aec-4419-a0b0-8b3af5543e83/vimokovibofiguxusojejaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55379b27-6b99-4684-8644-fa71986c2ba2/do_you_feel_me_like_i_feel_you.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/84732565208.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_d89fe6690b2840c398f7fbed70ad66af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/2053149676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3309f0d3-8781-4c01-b8da-e5b60a87b8a3/does_lowes_have_benefits_for_part_time_employees.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/66662067253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42961a9-751c-430c-b814-4de0ed381d52/tuliguvotomir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6429cfe2-b302-4faf-a8b3-f4ee75db186e/39042917716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34bb6d73-f145-45c6-b989-36611842490d/niv_life_application_study_bible_large_print_bonded_leather_burgundy_thumb_indexed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75594ba1-63e5-44d0-92e1-ebf1b5ce70b8/54457402501.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_off0000eaf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF4 5400 bytes
SHA-256: be53ad58a9b48bb496c9ac5dac3fce3000212b41a2725406e0d56083c57b6ad8
font_01_sfnt_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 10728 bytes
SHA-256: bdc2d6197906471e354999a7f706432d2e01c220c9b56f36dab2c081e3adc32c

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