Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e77d57ba131dffc…

MALICIOUS

PDF

77.6 KB Created: 2021-03-14 02:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 92da6b5760f941e787c5572af0042998 SHA-1: aa4cb9fa6c2f083459d8e0a5bb0424d775f14723 SHA-256: 0e77d57ba131dffcf4aba9eade2b20b58a005d2a55ab07430142d38180fe89a8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, https://bologen.ru/award?keyword=carbohidratos+enlace+glucosidico+pdf, being directly associated with the document's apparent theme. The PDF also exhibits characteristics of a link farm on disposable hosting, suggesting a tactic to distribute malware or phish for credentials. No scripts were extracted, but the presence of external links and the overall heuristic profile 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://bologen.ru/award?keyword=carbohidratos+enlace+glucosidico+pdf PDF link annotation
    • https://mokazeke.weebly.com/uploads/1/3/1/3/131384082/2293019.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/btNWjfc/royal_farkle_dice_game_rules.pdfIn PDF document text
    • http://virinuwatun.iblogger.org/23260704325.pdfIn PDF document text
    • https://jipubegu.weebly.com/uploads/1/3/1/0/131070098/wibavetopa_sozodomesadawox_lifonufexevilo_xugoxito.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/ZDgcehd/70657111655.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/zufotolabok.pdfIn PDF document text
    • http://bilabugova.iblogger.org/precio_libro_cancion_de_hielo_y_fuego_juego_de_tronos.pdfIn PDF document text
    • http://rogepexegugujer.22web.org/folupuw.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/fikanivamenedelorej.pdfIn PDF document text
    • https://punobedu.weebly.com/uploads/1/3/2/6/132683181/28621.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/zomuzigo/68712487760.pdfIn PDF document text
    • http://jifunujori.rf.gd/guide_du_consommateur_responsable.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/financial_report_analysis_meaning.pdfIn PDF document text
    • http://malinaliwul.epizy.com/8240521740.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/wings_of_fire_book_in_bangla.pdfIn PDF document text
    • http://nasuxenabo.epizy.com/canisteo_weather_report.pdfIn PDF document text
    • http://togaretib.epizy.com/bandish_1996_movie_song.pdfIn PDF document text
    • http://xakodalomidu.rf.gd/hog_fattening_feeding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/bmj_case_reports_images_in_template.pdfIn PDF document text
    • http://jezowadu.epizy.com/42324670048.pdfIn PDF document text
    • http://bozumux.epizy.com/27417261874.pdfIn PDF document text
    • http://wuxigukupem.epizy.com/ctet_2019_paper_2_answer_key.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_off0000ee72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE72 5464 bytes
SHA-256: 3dad4ab5ba45ca0e9a3aef99160a649518024c15f240c43674967e11e7a2c671
font_01_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 12336 bytes
SHA-256: abdf6c7d0510cb1a73067aee106139fbe60a40282447f4431f1b12369db9d98c

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