Malicious PDF — malware analysis report

Static analysis result for SHA-256 668d187c6d3caf38…

MALICIOUS

PDF

102.3 KB Created: 2021-05-16 19:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b419bd37efb87d41c95f6c8f618abbd4 SHA-1: 78014b41a2afe00c26267faf3d9ee01cb0763be3 SHA-256: 668d187c6d3caf38175660373d1e1e9ac56c0bc1a6719809b6c06249e385aaf5
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of hosting many links on disposable domains, suggesting an attempt to obscure the true malicious destination. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/strik?utm_term=how+did+militarism+help+cause+wwi PDF link annotation
    • https://cdn.sqhk.co/gejupajo/jcvif6X/battle_for_the_galaxy_unblocked.pdfIn PDF document text
    • http://pizibameku.iblogger.org/75528357113.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/9d6b30e.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/50390689159.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/eidvxdV/tokudalunodogu.pdfIn PDF document text
    • http://ruvikuvi.mywebcommunity.org/up_board_exam_date_2020_class_10.pdfIn PDF document text
    • https://cdn.sqhk.co/lekabewoz/jcP8Zjc/labuxotitagusobaju.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/72195604864.pdfIn PDF document text
    • http://sofofetaletome.22web.org/lipuferuxijukevisogib.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/dulatafopufefivosawedunu.pdfIn PDF document text
    • http://gafowegane.iblogger.org/wepudemalil.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/gcoPicj/89577409818.pdfIn PDF document text
    • https://fasadosuz.weebly.com/uploads/1/3/4/0/134012998/0ed136d5a352.pdfIn PDF document text
    • https://vadopesi.weebly.com/uploads/1/3/0/7/130738994/95e968ed59890c.pdfIn PDF document text
    • https://cdn.sqhk.co/fogunedevare/dgfhbhc/restaurant_story_2_mod_apk_2019.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/hp_pavilion_27-qa179in_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/password_keeper_blackberry_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/when_to_change_transmission_fluid_honda_civic_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/guilty_crown_euterpe_song.pdfIn PDF document text
    • http://vivimopunire.epizy.com/strengths_and_weaknesses_questionnaire.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/bankruptcy_act_2020.pdfIn PDF document text
    • http://lavoxema.onlinewebshop.net/types_of_social_media_advertising.pdfIn PDF document text
    • http://wobadumiravolu.atwebpages.com/55456047567.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/92537034947.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_off00015338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15338 5368 bytes
SHA-256: f64bb33e145e24f61606f46a929eb5c01d8b575b48645d5bd5a1b6b8d9e929a3
font_01_sfnt_off00016553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16553 10908 bytes
SHA-256: 2b15d69835d5c7be4d9e9470e436ca6042f36e849658b29500938def5904adf2

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