Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b7c9f20eaa37d3…

MALICIOUS

PDF

73.2 KB Created: 2020-11-20 23:36:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 702f57dcc4352fbfe4383be2e8af30fe SHA-1: d300a2a2dd6ede4b4f44646822fc47d4a51aab42 SHA-256: 65b7c9f20eaa37d3417735ebb17e54c64bbc692b9d3d9105ff7d9b175aeb9b56
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=boondocks+theme+song+meaning PDF link annotation
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/bazesatoba-kanoj-ronagagekixik.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/ea448.pdfIn PDF document text
    • https://kulisofupelami.weebly.com/uploads/1/3/4/3/134354285/7870110.pdfIn PDF document text
    • https://nofituzajevi.weebly.com/uploads/1/3/4/6/134638777/zebomupa-temubexefadi-rodewosoko.pdfIn PDF document text
    • https://zuforupixonop.weebly.com/uploads/1/3/4/3/134394080/potabi-soduxirapusi-batemotasuwor.pdfIn PDF document text
    • https://sojejizewo.weebly.com/uploads/1/3/4/4/134460985/45fc7.pdfIn PDF document text
    • https://pumewuku.weebly.com/uploads/1/3/4/6/134638235/481233.pdfIn PDF document text
    • https://gibexafixawakog.weebly.com/uploads/1/3/3/9/133997419/9916304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9d8e0b1b-fef5-46ce-8179-73564a1ff296/kadhal_sadugudu_alaipayuthey_mp3_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/83807366901.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/elementos_del_cuento_de_terror.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/vexojagipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ffb50f-77dd-4f23-b2a1-441e7bb27dbc/45108796954.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/definition_of_leadership_and_management.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E5 5128 bytes
SHA-256: 5badd22f0e1984b47e5a402522700641df7a115c6f0d65c81df457f9a3f98523
font_01_sfnt_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 10308 bytes
SHA-256: a13e419d7eed35d5595aacff13efa7825abe1d855224bff4fd52f23d4756d859
font_02_sfnt_off00010963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10963 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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