Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b752cebdef1724…

MALICIOUS

PDF

115.0 KB Created: 2021-02-15 23:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9ca123961062e5e208fca1db1d7d046d SHA-1: 8c6f86faa3db94cc870bd7f0ac85439642dc2345 SHA-256: e1b752cebdef1724dd1abf5e7ad81d4bf9d897f114a2fe7824624bc5d610671a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://druttle.ru/strik?utm_term=soundarya+lahari+sloka+95+in+sanskrit PDF link annotation
    • https://cdn.sqhk.co/dugixikisim/oAhjihx/winning_soccer_evolution_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407303/normal_5ffa41b00fe2c.pdfIn PDF document text
    • https://kesakoti.weebly.com/uploads/1/3/1/0/131070149/6778410.pdfIn PDF document text
    • https://vedirivokezijil.weebly.com/uploads/1/3/4/1/134108565/1778807.pdfIn PDF document text
    • https://pugulewex.weebly.com/uploads/1/3/1/4/131406013/vuvisek-vosatanapos-nujojabu.pdfIn PDF document text
    • http://pusikoxelumide.iblogger.org/57086237228.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/guigCRR/natojazezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_5fe756f26fe5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489838/normal_601f32c176e38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_5fd0e5011da69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_601e8ff3c9e42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcdfac95bcd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388428/normal_5fe0b88b7ca39.pdfIn PDF document text
    • http://tusukezilineji.66ghz.com/mobile_brightness_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447663/normal_600380c7270f8.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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://s3.amazonaws.com/duzexefemosaxe/frp_bypass_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/free_liberated_manuals.pdfIn PDF document text
    • http://bedozep.rf.gd/guretaserogerugiw.pdfIn PDF document text
    • http://dujofaxuro.rf.gd/filmywap_official_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/copyreading_and_headline_writing_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/production_schedule_gantt_chart_template.pdfIn PDF document text
    • http://nopatiget.epizy.com/bhoothnath_return_movie_300mb.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00018694.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18694 18064 bytes
SHA-256: 55dd41397c9af7d3ba3637fb814413be923d6ca6a4e853058435faaaa3e85d4a
font_00_sfnt_off00010630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10630 5228 bytes
SHA-256: 99c7b2797f924769f3c7142cd30b4fc8c7f0985b6c92ca20d8d87978c9ff519a
font_01_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 10684 bytes
SHA-256: d2ce6f14277ebb608461107d8e4c5426fe0f1bdae6d584f194a887d386311640
font_02_sfnt_off000133be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BE 3772 bytes
SHA-256: 38ca0e522c264f10566fd8f9f5c124bdae5fd36c6204e1bfeee9d4d6bbef3686
font_03_sfnt_off00013f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F61 11052 bytes
SHA-256: fc18f88025c40797168aa7e8aa1d603941bb5e2b8dc1c1df87387671382abc55
font_04_sfnt_off00016375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16375 16164 bytes
SHA-256: bf732567efbe10dc9ad1c23a670734dcb1f23380af5fca76a466c5f2af679a86
font_05_sfnt_off00017893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17893 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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