Malicious PDF — malware analysis report

Static analysis result for SHA-256 faca9dd57ddef92a…

MALICIOUS

PDF

88.9 KB Created: 2021-03-04 04:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 994618f63d8f7ceafe3481de26ae93c8 SHA-1: 362cb7815191f2cf1047d5d2913c370aa68078ab SHA-256: faca9dd57ddef92a17ef0ee6fe563adc3b6d4c7b2b4841bbf74e06c27a832dc7
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/strik?utm_term=frigidaire+mini+fridge+retro+black+friday PDF link annotation
    • http://detonic-ordina.website/3d_car_designing_software9fnbt.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/2Rghkif/when_is_wolfquest_3_slough_creek_coming_out.pdfIn PDF document text
    • https://rudotuvesil.weebly.com/uploads/1/3/5/3/135398110/2196d3e.pdfIn PDF document text
    • http://axecheat8.xyz/pdf_reader_gratis_windows_10q77ky.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/ibCBjeA/hungry_shark_world_hack_apk_2020_ultima_version.pdfIn PDF document text
    • https://cdn.sqhk.co/jejefudebuxi/igGjdNi/transparent_screen_lock_ubuntu.pdfIn PDF document text
    • https://febavezexiwajo.weebly.com/uploads/1/3/4/7/134703432/4862745.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489988/normal_5ffc6361930eb.pdfIn PDF document text
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/jodixinamiba.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/bhe0pjx/how_do_you_spell_street_credentials.pdfIn PDF document text
    • http://bipiraxas.iblogger.org/26096613590.pdfIn PDF document text
    • http://arendaavto.taxi/parent_plus_loan_fee_calculatorb7fdt.pdfIn PDF document text
    • http://ch-redirect.icu/kingdom_hearts_light_novel_read_onlines97gn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392867/normal_60199ced7cbbc.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/cihogeQ/kevidunidin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nelaxufap.rf.gd/19520800963.pdfIn PDF document text
    • http://goterarok.rf.gd/jugosawililuzatesulujo.pdfIn PDF document text
    • http://nuxizutize.rf.gd/edesign_curriculum_lesson_5_answer_key.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B91 5424 bytes
SHA-256: bc74bc7f8c817a84ee2861225895b7bb422a9c6b96e9702775e671371fd6b167
font_01_sfnt_off00012e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E03 11764 bytes
SHA-256: 380d10868f89e5559cb635265559e94d549e95f8ad240754601ff137a7e7edd1

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