Malicious PDF — malware analysis report

Static analysis result for SHA-256 5071a8222d02a9cc…

MALICIOUS

PDF

94.9 KB Created: 2021-06-07 03:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 870fc558b644e54210354caaf2e8bebf SHA-1: b2b0f433d30ccc4d85dcdbf7dc6afe55a6a45875 SHA-256: 5071a8222d02a9cc0ed6fc76e842805cbf5f7f86baef5261ed3ad320cc56e896
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a large number of links, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a phishing or scam campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://irlanc.ru/pbw?utm_term=how+to+do+badge+glitch+2k20
    • https://tolonatapuxid.weebly.com/uploads/1/3/4/0/134042297/refelit.pdf
    • https://static.s123-cdn-static.com/uploads/4450517/normal_5fe5ea413ecc4.pdf
    • https://static.s123-cdn-static.com/uploads/4486193/normal_5fcf851d2e2d0.pdf
    • https://wegoboxup.weebly.com/uploads/1/3/4/7/134772399/61e0ae7b22027.pdf
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5fd3b1c523612.pdf
    • https://bigufoxorifef.weebly.com/uploads/1/3/1/8/131871864/juxonomebekuvap.pdf
    • https://cdn-cms.f-static.net/uploads/4402951/normal_603abeb7c5d0d.pdf
    • https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/2344529.pdf
    • https://cdn-cms.f-static.net/uploads/4476567/normal_606246a021223.pdf
    • https://cdn-cms.f-static.net/uploads/4388815/normal_6054b3bdb7ae3.pdf
    • https://cdn-cms.f-static.net/uploads/4415950/normal_605521a5b5179.pdf
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5ffcb7b3262b7.pdf
    • https://cdn-cms.f-static.net/uploads/4444644/normal_6022b439ebbdd.pdf
    • https://cdn-cms.f-static.net/uploads/4381098/normal_603159714339f.pdf
    • https://static.s123-cdn-static.com/uploads/4460944/normal_5fee84f51a09b.pdf
    • https://cdn-cms.f-static.net/uploads/4374840/normal_60594eae16aea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://niluputevi.pbworks.com/w/file/fetch/144452457/dazoroguledaxasizikof.pdf
    • https://uploads.strikinglycdn.com/files/05cdf471-2613-49bd-889a-fa2550eced3e/fabij.pdf
    • https://uploads.strikinglycdn.com/files/fe7925a5-639a-4801-9daf-c56b19a26486/panasonic_inverter_microwave_manual_nn-sn651b.pdf
    • https://uploads.strikinglycdn.com/files/8d67e4a3-2dce-4403-9f24-cec19dc91272/dyson_dc50_stopped_working.pdf
    • https://uploads.strikinglycdn.com/files/3b1e1d63-d137-44f2-8413-36360d27ad44/what_is_contemporary_theories_of_learning.pdf
    • http://didaneguk.pbworks.com/f/mujodixalaxazaferofel.pdf
    • http://deburajuza.pbworks.com/f/tovujedefedeso.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010359.bin
0b8229394734efa2e295cec3cc403ba288abb47e96506a0bd2f7a7659c954bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 2988 bytes
font_01_sfnt_off00010e00.bin
3c66774359da13d93d42794b0e7d8ad3693119d4e276776934701e62b50038be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 5456 bytes
font_02_sfnt_off0001209a.bin
3cfc73099ccaed45e8820eeea8ec5ad3e433b1409951ebe1add86fbae2826445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1209A 2412 bytes
font_03_sfnt_off00012b54.bin
04871303e15acbb495fd93de8e490019c0f6cd659b6cd4e249711767b9c72c4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B54 12244 bytes
font_04_sfnt_off000154fb.bin
1b44218257806f750c7fedc2cca84b6b30ff477c2da870f9e14c0541087d9c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154FB 16544 bytes

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