Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e1f2dde31fc9e3…

MALICIOUS

PDF

74.8 KB Created: 2021-04-07 13:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 21cbc359fb8d8925371df7478f49c909 SHA-1: 14b2f5a35ee3628a782ce51f0ffed840db5bd136 SHA-256: 93e1f2dde31fc9e3a29301fdf058554287547c71e5e93a12ca8d4266bb37240c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to contain keywords related to 'weight loss meal plan' and 'wkhtmltopdf', likely serving as a lure to entice users to click on the embedded malicious links.

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://leonvi.ru/award?keyword=extreme+weight+loss+meal+plan+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426558/normal_5fdc281474e9a.pdfIn PDF document text
    • http://rejamar.sportsontheweb.net/10773794529.pdfIn PDF document text
    • http://trokot-newshop.online/how_enter_bios_on_hp_laptop3u1pg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_6040a3ecee054.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/0dd02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413843/normal_5fe459a362399.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/gufeseze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477635/normal_605f8eb66ca4e.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/acroleina_en_alimentos.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/sodunefupexa.pdfIn PDF document text
    • http://akmurzina.com/biblia_jerusalen_para_descargarflsbo.pdfIn PDF document text
    • https://bamutemo.weebly.com/uploads/1/3/2/6/132681362/tadubumowi.pdfIn PDF document text
    • https://wugabatove.weebly.com/uploads/1/3/5/3/135318753/6564163.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413125/normal_5ff5310e202c8.pdfIn PDF document text
    • http://reduslim-shopofficial.site/33777236062f00yz.pdfIn PDF document text
    • https://mokasinerosun.weebly.com/uploads/1/3/2/6/132682676/gisonese_xalosomulifade_loxemetijeg_mututexi.pdfIn PDF document text
    • http://voiprormul.xyz/33116999893r6iox.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/jenisozazewubo/cnet_free_photo_editor_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/gipexajizudaleramigevibe.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_off0000e563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 5572 bytes
SHA-256: cd15c583185f3028f179288e2f7665f1dd64d8ade024ab0b5a30fecff3014d06
font_01_sfnt_off0000f849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF849 10432 bytes
SHA-256: c7a08c286dc7857e6d02500f83ea664ac721c3bcae77d9dd70af5dfc53d27f80

Open this report in the interactive analyzer, or submit your own file for analysis.