Malicious PDF — malware analysis report

Static analysis result for SHA-256 e745deceff61145f…

MALICIOUS

PDF

67.4 KB Created: 2021-03-02 19:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e354d14cffe3f6014b4c64f9d2d1b871 SHA-1: cf90ff8d28b4d45427bb6e59f3060c6b4c8321ae SHA-256: e745deceff61145fa1a9182eff7424dd44ef0b01a633294d8f335441ffa1a1a9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, suggests a lure related to "Blanket with snaps". Numerous embedded URLs, including one pointing to a link farm on disposable hosting, strongly indicate an attempt to redirect users to malicious sites for phishing or malware delivery. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=blanket+with+snaps PDF link annotation
    • http://uscreditmonitoring.info/pulegupavoligkw75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422377/normal_600f2d55c68a4.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/gopro_4_silver_as_webcam.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/17188019808.pdfIn PDF document text
    • http://astropsychology.site/aztec_strategy_eu4oydbt.pdfIn PDF document text
    • http://blablablacar.online/gojutafusixebakosikasalungxlc8.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/2d_3d_shapes_worksheets_grade_1.pdfIn PDF document text
    • https://makirogu.weebly.com/uploads/1/3/0/9/130969002/bixaxajapogagaj.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/ganonomoja.pdfIn PDF document text
    • http://feseburowikuted.22web.org/bachon_ki_kahani_video_free.pdfIn PDF document text
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/9e4fa59.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/wajugepesu.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/what_are_the_top_5_critical_thinking_skills.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5feb52f179b9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ginowane.onlinewebshop.net/viwuwojorikeropanag.pdfIn PDF document text
    • http://jefeduwikiw.epizy.com/eclipse_neon_linux_64.pdfIn PDF document text
    • http://ziwebizivag.epizy.com/idiot_s_guide_to_photoshop.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_off0000cc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2A 5016 bytes
SHA-256: 1da35351dce66c69993e8a2883eec60945a09a37fc7fb657c7012713356cba51
font_01_sfnt_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 10448 bytes
SHA-256: 3d7612be2b8a6ecdc345c239a6ccd72389b1c5f105662da6fa7bcf25ac44c5df

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