Malicious PDF — malware analysis report

Static analysis result for SHA-256 b162f34c7845b430…

MALICIOUS

PDF

77.0 KB Created: 2021-03-19 16:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 128919df7a73ed287e5e3dbe001daa17 SHA-1: 749f9bb546bdc7ac26d98bc6b68a3a3b890046b4 SHA-256: b162f34c7845b430dd16505ef909b869ebb6f83f5e0915f5f26afc0a12e3c817
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 0.9994

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://baarspo.ru/123?utm_term=tactical+urbanism+materials+guide PDF link annotation
    • https://cdn.sqhk.co/gadukupuwe/wP5jbnW/teaching_english_grammar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_601377cc5e3d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fc8c41895cd0.pdfIn PDF document text
    • https://lidowape.weebly.com/uploads/1/3/4/4/134403474/ronojedomo-guzoxu-kokokage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_604100a654129.pdfIn PDF document text
    • http://lasomupigo.iblogger.org/81396407366.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/didjfgc/texuzot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_6026ee327e51d.pdfIn PDF document text
    • http://nuxefigemotak.22web.org/top_5_bollywood_music_website.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/miwiwolege.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/jg5gjif/11760869718.pdfIn PDF document text
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/76b0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382779/normal_5fcbe50db81fd.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/yAm8tgd/hammer_union_manufacturers.pdfIn PDF document text
    • https://fowezojufogomod.weebly.com/uploads/1/3/5/3/135307270/82dd4275827ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460231/normal_604ee34263a7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487622/normal_5ff5da172bf22.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/b483e72f-5885-48bb-b6e4-367633126686/17812067140.pdfIn PDF document text
    • http://valajawegob.epizy.com/26828674276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5103c769-3f9a-4de6-953b-1b73d9e8e8af/71987905557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd4add6-bf5d-4dd5-b3da-c30898250484/unication_pager_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d477765b-813c-412a-8304-0b024e37b6ba/raxolaxidopanizefopakaj.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_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 5120 bytes
SHA-256: d32a14ea641d41719eaeaad521e6100d66dea178b34a3cbc7bdd9f44be1a1d44
font_01_sfnt_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 10636 bytes
SHA-256: efdb4d132da4579ec29d8db6e444b35b97c309a2543feb9045be9c57f68a32ce
font_02_sfnt_off0001165c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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