Malicious PDF — malware analysis report

Static analysis result for SHA-256 33da734c1c7e7d8d…

MALICIOUS

PDF

77.9 KB Created: 2021-05-10 09:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 421d7769cede1152c21d9ec03cc3c458 SHA-1: 585ea4e5fd388464d26ef457521583db8bd07c4f SHA-256: 33da734c1c7e7d8d5005ce258d364945c0511d62dce10758b591aa46fb8a28d8
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to suspicious domains, including one identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

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://pelibifir.ru/strik?utm_term=how+to+make+origami+dragon+with+square+paper PDF link annotation
    • http://nudikegavugo.22web.org/1618736201.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/9afwPgw/titepiwonupokujarenelive.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/casio_g-shock_atomic_solar_gps_watches.pdfIn PDF document text
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/12c4fc15af4ca0.pdfIn PDF document text
    • https://mapulanedubo.weebly.com/uploads/1/3/0/9/130969056/ecd8e11f0e159a3.pdfIn PDF document text
    • https://cdn.sqhk.co/pejemomet/dgiVgcs/zuzerutilugetuworudusun.pdfIn PDF document text
    • https://lawanirixuxevu.weebly.com/uploads/1/3/4/4/134444287/3899887.pdfIn PDF document text
    • http://lasiwefomibew.sportsontheweb.net/zakusifiwekedan.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/iigciek/layout_instagram_apple.pdfIn PDF document text
    • https://xopilinunerixaw.weebly.com/uploads/1/3/1/3/131380618/67516806571.pdfIn PDF document text
    • https://wejolizamu.weebly.com/uploads/1/3/4/7/134766198/zijusojitapanag.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/438e3f20-f02f-433f-9ddd-83df297e5ec1/5863806604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d84e327c-5001-4789-a352-0a57e8069830/z_for_zachariah_summary_of_each_chapter.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/geotech_report_cost_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/the_outsider_colin_wilson_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/20110414941.pdfIn PDF document text
    • http://rovizomaguwex.atwebpages.com/vuxonevedozavi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/how_to_fix_a_ps3_controller_that_wont_turn_on_or_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/lefagukesaginafu.pdfIn PDF document text
    • http://desorebo.epizy.com/36636260031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ad2ad6-dcf7-40c9-a60e-1ef568455bb2/90010250414.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_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 5468 bytes
SHA-256: 87c1bad635a66cfeb442e228826a431b487360ad0bdc3f706ba500a6721a03ae
font_01_sfnt_off0000f625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF625 10532 bytes
SHA-256: c29d600e6b44ce9e7f6257166cb43a6593b75a91d204c52fbe27523e07f12a6b
font_02_sfnt_off00011a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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