Malicious PDF — malware analysis report

Static analysis result for SHA-256 4217919fe7125607…

MALICIOUS

PDF

76.0 KB Created: 2021-03-01 12:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 29ab5325d3d5994792c842842eed3369 SHA-1: ecafefd499c4a753fcf3b610ed0da8c4ef7def74 SHA-256: 4217919fe7125607f516d334050d34e57eae944f7b3c04086e5e2f911be7f941
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=dell+inspiron+15+p66f001 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369919/normal_600b5881c97cf.pdfIn PDF document text
    • https://cdn.sqhk.co/dusujukakal/V9hehjX/dragon_city_hack_pc_facebook.pdfIn PDF document text
    • http://puwuditufu.22web.org/xbox_360_jtag_beginners_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_6039f34c6314f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fd61182cca61.pdfIn PDF document text
    • http://mazanatur.space/33529219988b8wm1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366033/normal_5fee53852ed10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fc7b2da78610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454055/normal_600a239dabf71.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/iargigS/fezobozu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugorufu.epizy.com/adobe_reader_pc_version.pdfIn PDF document text
    • http://bolekatu.rf.gd/disneyland_theme_park_map_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/polaroid_frame_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/ajax_php_multipart_form-_data.pdfIn PDF document text
    • http://nafovivejaza.epizy.com/fundamentos_filosoficos_de_la_educacion.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/aashiqui_2_film_ke_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/16551978402.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_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 5156 bytes
SHA-256: 5040e001a70eccde61a8614c9c936abc5f6ba4b7b2b851332aaf6a354393a460
font_01_sfnt_off00010074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10074 10184 bytes
SHA-256: 92a6a10efbc7dd30f6828b6c8123c43c50c9157705d87b688f15a5b11c896733

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