Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3299dfa8e37835…

MALICIOUS

PDF

77.8 KB Created: 2021-03-16 05:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bc689b1b29896e668e3e0038dcc895b0 SHA-1: 93444cde9922ef4f446c26fb0617247391f3306e SHA-256: 4d3299dfa8e3783502734c06bdf059bd3a7d690f0de89d87d7b444e779bc72e0
186 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. 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/wix?keyword=study+guide+for+accounting+grade+11 PDF link annotation
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/rowemideja.pdfIn PDF document text
    • http://gonisavuxur.iblogger.org/the_time_travelers_wife_movie_explained.pdfIn PDF document text
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/bibogigaxud_nefabevak_finituxolomopaw_ziruxij.pdfIn PDF document text
    • https://jafoxexaromomev.weebly.com/uploads/1/3/5/2/135296472/sigaduw.pdfIn PDF document text
    • http://bupetud.xyz/407374929009b5m.pdfIn PDF document text
    • http://foyou.store/posogovojogugawuwemo5oaye.pdfIn PDF document text
    • http://50offit.pro/falinilinoh43xp.pdfIn PDF document text
    • http://bbflowers.net/43963492613wu2pt.pdfIn PDF document text
    • http://toxapuso.22web.org/how_do_you_download_a_ti_84_calculator.pdfIn PDF document text
    • https://nenafusorez.weebly.com/uploads/1/3/1/4/131453248/bdcc0e.pdfIn PDF document text
    • http://alkim.xyz/como_convertir_pulgadas_a_centimetros_en_excelt5r72.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/gedimuta/72734380901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a857c64c-6302-465d-ae39-edc0ca90e7de/58894685252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d140e5a-2384-47ed-9b3c-83f09a1dd2d0/2017_nordictrack_commercial_1750_assembly.pdfIn PDF document text
    • http://bofoguvixevijin.epizy.com/how_to_use_quantitative_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/77677989420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/923f2018-bbe0-4c5c-8d6f-c92c156674bc/el_pollo_loco_allergy_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f08a0e-6646-4799-87bf-c3f2db3454b9/expert_card_technique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e67dd2f-015e-4d40-8d42-e0d5e87eb269/25164213059.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_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 5236 bytes
SHA-256: 9631634fdeee793ca529c716e8097d59fbe83a4b08c4c87173e98b7f3d132d0e
font_01_sfnt_off00010385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 11300 bytes
SHA-256: 56764494e7e7ee163b7bffbff6820253f0953500e7e6469611fc8113fd322d65

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