Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace859b05836d6ee…

MALICIOUS

PDF

128.2 KB Created: 2021-03-20 02:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b77dd7dbff58ed8795121ee68da8e30b SHA-1: cf5b1ac4b8a3fd3a41a24f296d64d3a13a0a6ee6 SHA-256: ace859b05836d6ee856552819223fd23b0384b2bfe3ce7aea344cd728c46e18f
186 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=neverwinter+nights+2+character+guide PDF link annotation
    • http://mumolazesinidix.getenjoyment.net/nutiwodutakoxizoluzu.pdfIn PDF document text
    • http://lerimofo.mywebcommunity.org/8480089951.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/5830717520.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/rorenoku-bebigi-viritawovo-mixaguju.pdfIn PDF document text
    • https://najibiwamedixi.weebly.com/uploads/1/3/4/9/134901652/138043.pdfIn PDF document text
    • http://fuxanujibiz.mygamesonline.org/xozugimi.pdfIn PDF document text
    • http://gapewikegolunop.iblogger.org/xaxejaruka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_3668a87b8cf74d84a989b2959d8d305a.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_7820834e9420445981e8d7ebb75e41eb.pdf?index=trueIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_818bec2d6a7346309bb05a60b6b4e816.pdf?index=trueIn PDF document text
    • http://mulusatore.rf.gd/ap_lab_2_enzyme_catalysis_answers.pdfIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_c577db6c7dae44948ac216def493ffe0.pdf?index=trueIn PDF document text
    • http://robavumu.rf.gd/durga_saptashati_path_vidhi.pdfIn PDF document text
    • http://dupikupujetilu.rf.gd/exide_lithium_ion_battery_datasheet.pdfIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_1e40d306b80f4aaabce8ed436e7a4ffb.pdf?index=trueIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_91a7e0cfec434b0198841a3019ba9410.pdf?index=trueIn PDF document text
    • http://bamoxogoxufoge.epizy.com/61317497231.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_3d7fe1463e62471997d715b8da4d8ef2.pdf?index=trueIn PDF document text
    • http://bizepusozuj.epizy.com/fall_of_reach.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_13cedc50ddb34d649cf68d1ce330c695.pdf?index=trueIn PDF document text
    • http://tizurobele.epizy.com/how_to_use_bollinger_bands_indicator.pdfIn PDF document text
    • http://bikozotisuz.rf.gd/cazadores_de_sombras_ciudad_de_ceniza_pelicula_completa_en_espaol_latino_repelis.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_off0001b75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B75C 5424 bytes
SHA-256: 7370a71889090648363beda57b9d627926e2613607ea8adfb8bc58eef65a71e9
font_01_sfnt_off0001c9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9E7 12036 bytes
SHA-256: 3301f6dc1f944407d23b0c6857fe4ba17fc5391e3552f053ca7360a7fd07a1b1

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