Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a2b66ac64ea72c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-12 01:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cdfa799e26abcd44d05001c0d1ebdd7 SHA-1: 1a058e7d62ea79faf354725154e01e4c68097fa3 SHA-256: d2a2b66ac64ea72c516cbc5b79f944567af5a6e8b71b7e33cd6cb837dd8fc91c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external websites, many of which are suspicious and likely part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/award?keyword=glicosideos+cardiotonicos+pdf
    • http://yourbigdick.space/66846205312580sj.pdf
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/6903857.pdf
    • http://manapuzasupin.sportsontheweb.net/citas_biblicas_poder_de_la_oracion.pdf
    • https://gusupaserilobe.weebly.com/uploads/1/3/5/3/135312632/lixawakuxapu.pdf
    • https://static.s123-cdn-static.com/uploads/4449627/normal_5fdec367e7708.pdf
    • https://static.s123-cdn-static.com/uploads/4456982/normal_5fe4c5b375198.pdf
    • http://lavogomibonit.iblogger.org/puffin_browser_pc.pdf
    • http://rowomonug.mywebcommunity.org/learn_english_through_story_advanced_level_6.pdf
    • http://groshyk.site/maserati_granturismo_sport_review_top_gear8euly.pdf
    • http://mamefumiwuto.mywebcommunity.org/dyson_v6_absolute_reviews_uk.pdf
    • https://nomibazet.weebly.com/uploads/1/3/1/4/131437462/xobuvega_wenureregux_saxizadov.pdf
    • http://wumijodurixemi.22web.org/devofapaxus.pdf
    • https://vefurubaturuxal.weebly.com/uploads/1/3/0/7/130739777/puzogosokebomip_wepopokumene_metuguroxo.pdf
    • http://fujigukatujewu.medianewsonline.com/57733462068.pdf
    • https://zefakibafiv.weebly.com/uploads/1/3/1/3/131383453/6d0050ab0.pdf
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/566365f50a0faa.pdf
    • https://wisemawuperu.weebly.com/uploads/1/3/0/7/130738751/wojanuwemagilili.pdf
    • https://vekewofamir.weebly.com/uploads/1/3/4/1/134131384/5107606.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://duwopatovulid.rf.gd/islamic_dua_book_bangla_free_download.pdf
    • http://tesedep.rf.gd/health_and_safety_engineer_duties.pdf
    • http://jiwuboro.epizy.com/63267771293.pdf
    • http://tososite.onlinewebshop.net/majizifexeg.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb09.bin
4a017fa730ad2755a78b6770bace1e616060c76947dea38776783277dcad4144		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 5180 bytes
font_01_sfnt_off0000fcbd.bin
3d598a66462d555c38f96816ec6dcd864cedf95670fab285990ac05bc9ac62f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 10452 bytes

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