Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd989d8efe148016…

MALICIOUS

PDF

74.2 KB Created: 2021-05-13 19:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3a3bf388742faebe5a407da4d0ed51c3 SHA-1: 10b95b6c7857d4b349420f3091aaebbc4b26ada2 SHA-256: cd989d8efe1480167ed91ea6d5e45d121b3dc8e6e960531e2083296de10f27ab
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and a specific URL is presented in the document body, likely intended to lure the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=how+to+replace+drain+tube+on+lg+washer PDF link annotation
    • http://jiwapadenejeza.getenjoyment.net/take_5_oil_change_employee_reviews.pdfIn PDF document text
    • http://zawukinaloluku.sportsontheweb.net/gijadeb.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/kalufozi_bapezotinum_jikapolalapupo.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/87809807702.pdfIn PDF document text
    • https://sidatotivokusud.weebly.com/uploads/1/3/5/9/135959985/sevunoji_temuzazove_xuroxaras_ziwog.pdfIn PDF document text
    • https://dirotazu.weebly.com/uploads/1/3/1/0/131070105/5034528.pdfIn PDF document text
    • https://vetinuvejozijuk.weebly.com/uploads/1/3/4/7/134745319/2282876.pdfIn PDF document text
    • http://zulesaxeririv.sportsontheweb.net/how_to_add_save_as_button_in_excel_2020.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/koi_aap_sa_movie_480p.pdfIn PDF document text
    • http://wowirawemiwobod.22web.org/sofaxizutixetak.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/taurus_millennium_pt111_g2_size.pdfIn PDF document text
    • http://lotukaguw.sportsontheweb.net/at_command_sim800.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/megujoxilipawakufizuku.pdfIn PDF document text
    • http://zibanozoxepezu.iblogger.org/30793930326.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radiviwix.onlinewebshop.net/mifujumev.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/handbook_of_health_promotion_and_disease_prevention.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/64261993602.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/how_to_clean_jenn_air_range_hood_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/allah_name_wallpaper_image.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/webasto_engine_heater_not_working.pdfIn PDF document text
    • http://xiwexuxe.atwebpages.com/runexok.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_off0000e370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE370 5528 bytes
SHA-256: 704b3ff6a4cbc70bb29583d5243a9af79275ffdca620dade9d8cd30638dc9b21
font_01_sfnt_off0000f63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 11004 bytes
SHA-256: b3342b7b39ada8463f8b6b9e02bde128f3d4d18021d4249b9eb90fc7d4b13da8

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