Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e61bad251cc5473…

MALICIOUS

PDF

69.9 KB Created: 2021-04-25 19:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a87cc46527ad25f83e740abd855eff9 SHA-1: 155f93c8b85d44ff0d9198a3d9a636e43f8843f9 SHA-256: 0e61bad251cc54739d80d3ff2aef3ff4645252c28eab4b1753a379a388db7d73
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=asus+p5n32-e+sli+plus+bios PDF link annotation
    • http://drenajkrasnodar.ru/9243566028yzbih.pdfIn PDF document text
    • http://depusapo.mypressonline.com/fargo_hdp5000_service_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_6048a365f178d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_601f8ec67aac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_604fb9d2db8a2.pdfIn PDF document text
    • http://kuboduzuke.mypressonline.com/gewuvunifivilelatun.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/sopebizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_5ffbebcb49541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5feb176fd802e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450347/normal_5feb79909cdd8.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/2hhjcEz/general_grievous_costume_child.pdfIn PDF document text
    • http://hot-money.fun/467907460839bttg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5fc952c7bc853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465702/normal_5fe4eaba80221.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/ifsLQOW/choices_stories_you_play_vip_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472486/normal_5fdf5e1ba3e39.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/xuvamuba/vugujumuba.pdfIn PDF document text
    • http://jazopizebe.atwebpages.com/xoluxexuje.pdfIn PDF document text
    • http://zeteximezoxa.myartsonline.com/xozof.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/whole_new_world_sheet_music.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_off0000d451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD451 5088 bytes
SHA-256: d228681e28caf02f5e9195466bb0c9bf63c7f249264fed618b27273da7dd3f2a
font_01_sfnt_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 10788 bytes
SHA-256: 24de148a7465dc4b3b54914c2ce1fd43385149b8ad5e765d84fc78c08daeba99

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