Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bfee037eaf2ae6…

MALICIOUS

PDF

76.6 KB Created: 2021-06-14 10:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e95e9254841330bdd16d04c52d2f594b SHA-1: 521373404b20de50b43855699565c40141b652ce SHA-256: d5bfee037eaf2ae6e0457c77df98be750b47c06028e5b2ef6486a807d6eca5dc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, suggests a lure related to 'Punjabi gidha boliyan'. The presence of external links and the link farm heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/pbw?utm_term=punjabi+gidha+boliyan+written+in+punjabi+lyrics
    • https://kijilijesudopob.weebly.com/uploads/1/3/0/7/130739968/punoled_nibogatopokop_zorizetobef.pdf
    • https://static.s123-cdn-static.com/uploads/4383340/normal_600306584a473.pdf
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5fe97e30cc0bd.pdf
    • https://cdn-cms.f-static.net/uploads/4382193/normal_60c5a6978688a.pdf
    • https://rivoliga.weebly.com/uploads/1/3/5/3/135311175/9280777.pdf
    • https://static.s123-cdn-static.com/uploads/4387815/normal_5ff0a43e9f5c1.pdf
    • https://cdn-cms.f-static.net/uploads/4452846/normal_5fd76e4a34622.pdf
    • https://ziloboze.weebly.com/uploads/1/3/2/6/132683463/kemovosozow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/32a86b3e-71c7-4b2d-ab2f-928bcdffcbe8/84141321445.pdf
    • https://uploads.strikinglycdn.com/files/aa4d4c9c-cb08-4186-9341-a1a5fe3d594d/tezeraziradubodetinudero.pdf
    • https://uploads.strikinglycdn.com/files/3eaa1288-78bf-4753-abea-90455fdd1300/nemexugakipazator.pdf
    • https://uploads.strikinglycdn.com/files/8e49956c-bd3d-4a87-b2ca-2755652f82da/80145722355.pdf
    • https://uploads.strikinglycdn.com/files/e29f719e-e4de-4ec4-8c6d-6208b80be26b/tidukigunafezomafu.pdf
    • https://uploads.strikinglycdn.com/files/a71bb2a2-131c-4425-9495-e9c57fd14f5b/63374086600.pdf
    • https://uploads.strikinglycdn.com/files/5cd6d64b-2652-48ab-b1d3-7e31d1648e88/high_definition_audio_bus_driver_windows_10_64_bit_amd.pdf
    • https://uploads.strikinglycdn.com/files/013e479f-24d4-4d5f-96d1-8c8dd2e799e5/molal.pdf
    • https://uploads.strikinglycdn.com/files/956d1966-5a76-4bf4-8dee-7fcde89d62b1/81474246429.pdf
    • https://uploads.strikinglycdn.com/files/4f4142a3-40be-4810-a306-fec418216158/63763057140.pdf
    • https://uploads.strikinglycdn.com/files/60eb94d8-b9d6-447c-8bc9-6a83414fb067/21590074559.pdf
    • https://uploads.strikinglycdn.com/files/2e62093d-0ec6-4b37-80a9-dfb48169e8e3/evolution_making_sense_of_life_3rd_edition_free.pdf
    • https://uploads.strikinglycdn.com/files/1f548c17-5082-4d15-bd88-675f3802e2c0/kaborov.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e001.bin
09749897c19f056330cac3f947f3371a990e8c0139ae05c5d674efc0e0acc7b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 5744 bytes
font_01_sfnt_off0000f3a1.bin
8512cf54c05b1487808f3b7500614403441d47b04a6ff3778f0f3ab4c7c9537a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 3096 bytes
font_02_sfnt_off00010060.bin
c810999dfb849ddc3513bcc546854a790e68a0c71b3e1c79480493f104a801a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10060 10668 bytes