Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9320f04444cc3c0…

MALICIOUS

PDF

101.1 KB Created: 2021-05-02 07:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 357188f8f92e2b4878fa2afdd5c63ee5 SHA-1: 2bae1aeb245e14fe6c99d88fb2be63e396c931b9 SHA-256: f9320f04444cc3c095ddbf3a351acdf932dda5d4e0c6db5dcc6983d91b1603bb
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to growth mindset and a tool name, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+growth+mind+power+in+hindi PDF link annotation
    • https://cdn.sqhk.co/pefisemise/heig88Q/nebuzefosi.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/iaRjgd1/champions_league_bracket_2020_quarter_finals.pdfIn PDF document text
    • https://cdn.sqhk.co/pitadewedobu/jiaihge/besikesadasinavanul.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/Bhjijic/clue_cast_1985.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/cugeu05/39080478308.pdfIn PDF document text
    • http://hardcreditcheck.info/lapefaxatitebufann43s.pdfIn PDF document text
    • http://logvoz.ru/lisemebonisejinirovupt6hru.pdfIn PDF document text
    • http://smcjd.com/lincoln_weld_pak_125_hd_gunxq6mw.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/delonghi_dch6031_ceramic_heater_reviewuh1n4.pdfIn PDF document text
    • http://ruxovesubilesuk.22web.org/adverbs_of_frequency_exercises_for_beginners.pdfIn PDF document text
    • http://tarusexozof.iblogger.org/gluten_free_culinary_school.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/44527130888.pdfIn PDF document text
    • http://zagavexakagin.mypressonline.com/36810029385.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://bonerewutejipa.rf.gd/93242160477.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/5983965984.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/finsbury_food_group_plc_annual_report_2018.pdfIn PDF document text
    • http://sosagid.epizy.com/caia_alternative_investments.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/juxipizoveno.pdfIn PDF document text
    • http://lafizevufevofe.rf.gd/35300514469.pdfIn PDF document text
    • http://gifazewuki.epizy.com/16212365850.pdfIn PDF document text
    • http://gobusef.rf.gd/biwop.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015271.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15271 17512 bytes
SHA-256: e6a600e321c99e78b0d5f4a674eb52e79f792b20699a5c8fa5bd53c401c099bd
font_00_sfnt_off00011420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11420 5004 bytes
SHA-256: 2eacf72f6e374e4bdc91951c14c85d49108028aa8f6a46556e3cbe7a8a28dc96
font_01_sfnt_off0001250a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250A 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0001306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306C 9844 bytes
SHA-256: 2aef36dcd05c159115f159f23e84f9ae53c3d6981a39ce777335febd5781df1c

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