Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d5a89436b96bcc…

MALICIOUS

PDF

74.1 KB Created: 2021-02-25 10:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4ce5e18dea6b59db6b94aaf1db970a5a SHA-1: 21c8931be9d826fc340376b426b07b3075eeae5a SHA-256: b9d5a89436b96bcce8f5f6b9ab715dd1ba50a64deff5dfc8691b87b3c1c6e4d4
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure malicious destinations. The presence of a 'download' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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://druttle.ru/aws?utm_term=canon+mp190+scan+driver+download PDF link annotation
    • https://cdn.sqhk.co/koroxofusino/hWijig4/marooned_with_ed_stafford_watch_online.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/how_to_read_a_welders_blueprint.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/fdtgjrw/harvest_town_characters_likes.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/gegjjen/tofeforikifuxelumumefe.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/hp_probook_4530s_battery_price_in_bangladesh.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/XhbgenF/spacex_stock_chart.pdfIn PDF document text
    • http://podonebatimekel.22web.org/14840669720.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/why_do_natives_not_have_to_pay_tax.pdfIn PDF document text
    • https://kisajevipog.weebly.com/uploads/1/3/2/8/132815123/lenuvefisuk.pdfIn PDF document text
    • https://pezuzani.weebly.com/uploads/1/3/4/6/134631528/karimu.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/jazuravazaguz/98578394430.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/how_to_perform_buccal_mucosal_bleeding_time.pdfIn PDF document text
    • http://borovob.epizy.com/20901229831.pdfIn PDF document text
    • http://lezefivupeke.epizy.com/80618995678.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/cancer_de_mama_y_embarazo_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/nazadegomanulodenule.pdfIn PDF document text
    • http://xadamun.epizy.com/android_tv_comprar.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_off0000e21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21B 5628 bytes
SHA-256: b4bafcb47692ea120bd4d09d82c8188fe23c1cc0daa2438ddb16d116743b9c96
font_01_sfnt_off0000f53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53C 11012 bytes
SHA-256: 56f2f924668f866ae2a697fbdf66d7482be206329d9160032a1f45bec27c310e

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