Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d0877a36933bba…

MALICIOUS

PDF

69.3 KB Created: 2021-03-08 13:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 747790663a180cb315fd8f3c2e0ca759 SHA-1: 8a7669dfe4fa293c083eb906c2b1095fc1ed9593 SHA-256: 94d0877a36933bbabf5f6eb4f8bbd2f29901fa5ba7b8c3f1e1957e4fdd2794fa
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 0.9998

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 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://pelibifir.ru/123?utm_term=akalicious+hell+naw PDF link annotation
    • http://xujilutobidiko.iblogger.org/gumming_sheet_dealer_in_delhi.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/zupuge.pdfIn PDF document text
    • http://sepibigejakina.22web.org/49963857120.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/91325236462.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/devometudisolude.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_a75987b0b11348d7bfb417b26584ba1f.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_a5cdcb8611494849a22d966a637f5844.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_2720e02ce5e743c7bf651b0e9c5b66a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1903c9bc-b7d9-4d97-9fee-ac1a7278f896/pawogukekowivapovegodi.pdfIn PDF document text
    • http://wupepiwora.rf.gd/new_odia_song_2018_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/ugandan_music_videos_free.pdfIn PDF document text
    • http://golokelu.rf.gd/pokijomu.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_25669434705042cf8eb5c6246641036c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6925975-7ade-4e5d-9c42-74c33aa3f5f4/47215503637.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/java_jdk_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdac141c-82ac-420f-aff1-65bd6cd25b86/telob.pdfIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_29b1faed57ae48bd8b2ebaa930ac05d5.pdf?index=trueIn 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_off0000d21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21C 4936 bytes
SHA-256: 15756dd9fb0101d430c238000988dc2b062f6ce0f0cc5173cc6d1aed347e7404
font_01_sfnt_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 11100 bytes
SHA-256: 9860b8126ec474668854a5029bbd4f6477cd7d0097108a866145edd6831bc228

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