Malicious PDF — malware analysis report

Static analysis result for SHA-256 93322b0ced77f75c…

MALICIOUS

PDF

80.6 KB Created: 2021-03-15 17:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 80516b6b35347c63c1347f9fccfe1c01 SHA-1: 6d5857913545d5d0b8697d8b4ceec5cad30ead95 SHA-256: 93322b0ced77f75c22b602d83da61dd27e5575335875ef360c5c510072a665b1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/award?keyword=download+big+book+biologi+sma+pdf+gratis PDF link annotation
    • http://freedate18.xyz/tibubulegokobisodk0rq.pdfIn PDF document text
    • http://pumba.fun/sources_of_chinese_tradition_volume_1wlqnl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_601ca8ee192cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_6017c0bb8c791.pdfIn PDF document text
    • https://zinuwikisabarek.weebly.com/uploads/1/3/4/6/134679236/palunifitewamox.pdfIn PDF document text
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/5038972.pdfIn PDF document text
    • http://pedrons.space/62812155742a76o3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_60466b4e93bb3.pdfIn PDF document text
    • http://ulekschool.online/latest_tamil_movies_free_websites486tj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378618/normal_5ffbe19fbad33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5fe845cc69d4d.pdfIn PDF document text
    • http://namsinc.info/how_to_print_index_of_dataframe_in_pythonlblub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_6047528fca118.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/720dcaac-3990-4c59-bf4e-4d1bd987778f/nogewesodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d5b0d9-5cb7-4a79-bb95-3aa3e2d28b21/anglo_saxon_riddles_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9970e6e-7b71-4925-a839-9f1068d3fb0e/stone_soup_recipe_from_the_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/mail_merge_google_sheets_to_gmail.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/22746402648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea86b01-a049-4410-9705-afffcc5a70bc/66534577039.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/tadomekobodatanawejef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c680d7c6-92bb-4036-b6fb-2cfbcb8db980/four_past_midnight_book_review.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_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 5324 bytes
SHA-256: eebfde0afea26765cfbb63ecc243de43b440ef85e9df836dc62b12f0ccbb35b0
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 10808 bytes
SHA-256: 3884751adf8a51834e2c1e84227b1b68cf0dd29feeb667993b53477ee5661129
font_02_sfnt_off0001266c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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