Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5d0374e2468fb8…

MALICIOUS

PDF

77.8 KB Created: 2021-02-02 23:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 27cf72dc0890b3c290fa739b1af71def SHA-1: 02e6897f698164c601bf1fd3a33957e07731336a SHA-256: 7c5d0374e2468fb87400f7a17f07bf4e87cb3e2aa452de1ae8da2f733d7e6428
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/aws?utm_term=adobe+photoshop+dots+brushes+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490524/normal_600e4951866c4.pdfIn PDF document text
    • https://puliwive.weebly.com/uploads/1/3/4/6/134660228/lifewodimawavo_tazirepowizusuw.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/5KYDign/dictatorship_synonyms_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_601718d141204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369331/normal_60054b0c9d5f8.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/3QJSRht/towosefudav.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/9eeb9e4aaf0.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/QZjdDgf/espn_plus_ufc_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464732/normal_600ce055b0c77.pdfIn PDF document text
    • https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/3dc8edefb24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_5fd18dc70452e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_60121d059ac15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://nisuzadusidu.epizy.com/46697798661.pdfIn PDF document text
    • http://burijudipo.epizy.com/17572097605.pdfIn PDF document text
    • http://rixupod.rf.gd/68436167353.pdfIn PDF document text
    • http://waxuxeg.rf.gd/principles_of_accounting_free.pdfIn PDF document text
    • http://zimemotom.rf.gd/affine_transformation_matrix_calculator.pdfIn PDF document text
    • http://mokuzamiwebifet.epizy.com/53824314295.pdfIn PDF document text
    • http://sonisan.epizy.com/lebatu.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 5016 bytes
SHA-256: b9e968dcd4f909314f2ac35df645cb87db57684bc91cfcfcec3dd5b915189f13
font_01_sfnt_off0000f441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 6148 bytes
SHA-256: be38186c9256ba0e64b07d34cca2e63b176d3ffd182ae4667a642b503e748fe0
font_02_sfnt_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 11000 bytes
SHA-256: 2dfe9fd3e560099d0ce1a78497f3079c9e877c73dd0347247ad99b546117df7b

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